Tag Archives: Botany

Plants of the Bodie Hills Checklist: January 2019 Edition

Plants of the Bodie Hills Checklist Cover 2019

Another year has passed and a surprising number of taxa (species, varieties, and subspecies) have been added to Plants of the Bodie Hills: an Annotated Checklist — about 50! Some of these are new finds in the field; some are new records in the on-line herbarium databases. Some of these are definite new additions; some are in the “maybe” category. The total count is now about 750 taxa.

Other changes in this year’s edition include the addition of keys to selected genera, and additions to the map on the last page (or back cover, if it’s printed 2-sided).

CLICK HERE to visit the Downloads page. The January 2019 edition of the checklist is a 64-page, 6.1 mb PDF file.

Here’s a selection of favorite plants seen during visits to the Bodie Hills in 2018:

Eriogonum caespitosum

Matted wild buckwheat: Eriogonum caespitosum

Eriogonum maculatum

Spotted wild buckwheat: Eriogonum maculatum

Salvia dorrii

Dorr’s sage: Salvia dorrii

Thelypodium laciniatum

Feathery thelypodium: Thelypodium laciniatum

Allium anceps

Twin leaved onion: Allium anceps

Angelica capitellata

Ranger’s buttons or Swamp white heads: Angelica capitellata
with lots of visiting insects.

Astragalus curvicarpus

Curvepod milkvetch: Astragalus curvicarpus

Rosa woodsii

Woods rose: Rosa woodsii subsp. ultramontana

Copyright © Tim Messick 2019. All rights reserved.

Plants of Hot Springs Valley: Additions in 2018

Asclepias cordifolia

1. Asclepias cordifolia

It’s time for another update to Plants of Hot Springs Valley and Grover Hot Springs State Park, Alpine County, California. I’ve added several plants to the list, based on explorations around the margins of the valley earlier this year, plus observations posted by others posted on iNaturalist. PDFs (for printing single-page format and booklet format) are available on the Downloads page of this site.

Agoseris retorsa

3. Agoseris retorsa

Here are 11 species (including one correction) added to the list in 2018:

Apocynaceae (Milkweed or Dogbane family)
1. Asclepias cordifolia – Purple milkweed – Sandy hillside with chaparral, along Burnside Lake Trail near the campground, north side of valley.
2. Asclepias fascicularis – Narrow-leaf milkweed – A milkweed with decidedly narrow leaves, growing in pine forest near the park entrance (https://www.inaturalist.org/observations/13825500).
Asteraceae (Sunflower family)
3. Agoseris retorsa – Spearleaf mountain dandelion
– In granitic sand along the Burnside Lake Trail, in forest openings or forest edges, west of the meadows.
4. Artemisia ludoviciana subsp. incompta – Mountain mugwort – Uncommon, along the eroding banks of Hot Springs Creek, west of the meadows. Perhaps also to be found in rocky outcrop areas.
5. Hemizonella minima
– Tiny tarweed – A small to minute, yellow-flowered annual growing in granitic sand along the Burnside Lake Trail near the campground and north of the falls; also among outcrops near the falls. (This is a correction: previously misidentified as Madia exigua.)
6. Malacothrix floccifera – Wooly desert-dandelion – A small annual growing in granitic sand in dry forest openings, along the Burnside Lake Trail north of the falls. The flower heads resemble small dandelions, with ray flowers that are white in the outer portions and yellow toward the middle.
Brassicaceae (Mustard family)
7. Capsella bursa-pastoris – Shepherd’s-purse – a very widespread plant (but not common here), found along the disturbed edge of a service road (where it doubles for a few hundred yards as the Burnside Lake/Charity Valley Trail), on the north side of the valley, west of campground.
Orchidaceae (Orchid Family)
8. Corallorhiza striata – Striped coralroot – In deep litter of pine needles in conifer forest along the Burnside Lake Trail, north of The Falls.
Polemoniaceae (Phlox family)
9. Ipomopsis aggregata – Scarlet gilia – In dry forest openings, west of the meadows.
Ranunculaceae (Buttercup family)
10. Ranunculus occidentalisWestern buttercup – Moist, non-alkaline meadows or moist places in forest.
11. Ranunculus testiculatus
– Bur buttercup – A weedy, unpleasant thing (“gets stuck in the pads of my dogs’ feet”, somebody once told me), native to Eurasia. It’s in a small area of disturbed ground in the meadow near Hot Springs Creek, east of the Hot Springs Cutoff trail, and perhaps in other disturbed sites.

Artemisia ludoviciana

4. Artemisia ludoviciana

Hemizonella minima

5. Hemizonella minima

Malacothrix floccifera

6. Malacothrix floccifera

Capsella bursa-pastoris

7. Capsella bursa-pastoris

Corallorhiza striata

8. Corallorhiza striata

Ranunculus occidentalis

10. Ranunculus occidentalis

Ranunculus testiculatus

11. Ranunculus testiculatus


Copyright © Tim Messick 2018. All rights reserved.

Primitive Mustards: Thelypodium in the Bodie Hills

Thelypodium laciniatum

Thelypodium laciniatum

Thelypodium (thely-POD-ium) is a genus of about 29 relatively stunning species in the mustard family (Brassicaceae, a.k.a. Cruciferae). The genus ranges across much of the desert and intermountain west, Columbia Basin, southwestern United States and northern Mexico. Four species occur in the Bodie Hills, Mono Basin, and adjacent areas: T. crispum, T. laciniatum, T. milleflorum, and T. integrifolium subsp. complanatum. A fifth species, T. flexuosum occurs to the north and east (as close as Carson City), but has not been documented in the Mono-Mineral-Lyon county area.

Thelypodium flowers (in our area) are mostly whitish, with slender petals. In most of our species the flowers are packed into a dense, tall, slender raceme with many dozens of flowers (but fewer flowers in a short inflorescence in T. integrifolium). In fruit, the plants develop long, slender, spreading or ascending siliques (fruits), parts of which often persist long after they have opened and scattered their seeds. I’ve noticed that late in the year, or early the following spring, these tall, dried-out stems with the remains of old fruits may be much easier to spot from a distance than fresh plants of the current growing season — especially in early morning light or against a dark background.

For more than a century, taxonomists studying Thelypodium and related plants have found it difficult to decide what species to include in this genus as opposed to other allied genera. Most of the species are fairly easily defined; the generic boundaries are not (Al-Shehbaz 1973). Little surprise, then, that learning to recognize Thelypodium as a genus is best accomplished by learning to recognize some of its species. The genus becomes recognizable once you have a feel for the differences and similarities among its species. Several other genera share various characteristics with Thelypodium, and together these are recognized as a larger group, the tribe Thelypodieae (thelypod-EE-ee-ee). Other genera of Thelypodieae found in this area include Stanleya, Caulanthus, Streptanthus, and Streptanthella.

The name Thelypodium is based on the Greek: thēlys for ”female” and podion, a diminutive for “foot.” This refers to the distinct “gynophore” in most species of Thelypodium. A gynophore is a kind of stalk or stipe (or foot) that raises the ovary and fruit above the receptacle of the flower. Payson (1923) asks, “What is the significance of this stipe? Recent students of the Cruciferae are nearly unanimous in the belief that this family has been derived from the Capparidaceae [Caper family, also treated as part of Cleomaceae] or from capparidaceous-like ancestors. . . . In the Capparidaceae a stipe [or gynophore] is almost universally present and is often very long. Granting this relationship between the two families, the presence of a stipe in the Cruciferae, in which it is not of common occurrence, must be considered either a primitive character or an atavistic [ancient or ancestral] variation. For the sake of argument . . . the stipe in this group will be assumed to be a primitive characteristic.” So, Thelypodium retains what is considered a primitive structure (the gynophore) in a family that has evolved (eventually losing its gynophores) and diversified with great success worldwide.

Photos showing the pedicel, receptacle, gynophore, and fruit in Thelypodium (left) and Cleomella (right). The presence of a gynophore in Thelypodium suggests an evolutionary link between mustards (Brassicaceae) and capers (Cleomaceae).

Upon finding a suspected Thelypodium in the field, here are the characteristics to look for (and photograph, if you’re posting to iNaturalist, Calflora, or CalPhotos):

  • Habitat: Where is it growing? On a rocky cliff or outcrop? In loose, dry, sandy or silty soil? In or near a moist, perhaps alkaline meadow, spring, or creek?
  • Leaf shape: These plants are biennials and the basal leaves wither as the flowering stems develop, so you will most often be looking at cauline leaves (leaves on the stems). The cauline leaves become smaller and narrower, with shorter petioles and less-developed lobes or teeth higher along the stem. Look at the lower and mid-stem leaves: are they deeply lobed, merely toothed, or entire? Are the leaf blades petioled or sessile?
  • Inflorescence shape: Is it a tall, elongated raceme of many flowers, or are the flowers and fruits condensed into a short, almost tuft-like raceme at the end of long branches?
  • Pedicel shape: The pedicel is the little stalk from the stem to the base of each flower. In flowers that have gone to fruit, or are beginning to produce fruits, is the pedicel spreading (more or less straight out from the stem)? Or is it bent, curving upwards?

Thelypodium crispum (Wavy-leaved thelypody) may be the commonest of the four species in the Bodie Hills, but it has the narrowest geographic range overall. It is found from Inyo and Esmeralda counties north along the eastern Sierra Nevada and western Great Basin to Lassen and Washoe counties. It grows mostly in moist, alkaline or mineralized, sandy or gravelly soils near meadows or springs, but occasionally also in sagebrush scrub or pinyon-juniper woodland. I’ve seen it also on subalpine glacial moraines above Virginia Lakes.

Thelypodium crispum

Thelypodium crispum

Thelypodium crispum

Thelypodium crispum

It’s generally the shortest Thelypodium in this area — typically under 3 feet tall, often just 1–2 feet tall. Mid-cauline leaves are narrowly lance- or arrow-shaped, sessile, and clasping the stem. The leaf margins are entire (neither lobed nor toothed), and may be either flat or wavey (leaves with wavey margins are called “crisped”; hence T. crispum). The fruiting pedicels are ascending, often pressed against the stem, and the fruits are straight, stiff, and less than 2 inches long. T. crispum is similar to and sometimes misidentified as T. brachycarpum. The latter occurs mostly in far-northern California and southern Oregon; its fruiting pedicels are horizontally spreading.

Good places to look for T. crispum include Travertine Hot Springs, Coyote Spring, other hot or mineralized springs, and Long Valley (east of Mammoth).

Thelypodium crispum

Thelypodium crispum

The next two species may appear similar from a distance — larger plants of both may stand as tall as a person, rising above the surrounding shrubbery, with striking, many-flowered racemes of white (or creamy- or greenish-white) flowers. Both have slender fruits 1.5–4 inches long, that tend to bend, curl, or droop when fully grown. On closer inspection, these two are easily recognized by differences in leaf shape, pedicel shape, and habitat.

Thelypodium laciniatum (Cutleaf thelypody) is a cliff-dweller. It favors rocky crevices and outcrops, and its distribution suggests it may favor volcanic rather than granitic substrates. Fruiting pedicels are spreading to just slightly angled upward, not strongly curved. The lower leaves are laciniate, i.e. irregularly lobed, often deeply so. The inflorescence may contain dozens to well over a hundred flowers. Plants may be few-stemmed or be virgately branched, i.e., with numerous stems fanning out from the base.

Thelypodium laciniatum

Thelypodium laciniatum often has many stems (but this may be 2 or 3 plants).

Thelypodium laciniatum

Thelypodium laciniatum is a cliff-dweller.

Thelypodium laciniatum

See how the pedicels of Thelypodium laciniatum are all straight? (yellow arrows). Except for one that read the wrong instructions.

Good places to look for T. laciniatum include the cliffs east of Hwy 182 and the East Walker River 1.1 road miles north of Bridgeport Reservoir Dam, cliffs above NF-028 at The Elbow, and the Owens River and Lower Rock Creek gorges. You may need binoculars for a good look at these plants.

Thelypodium milleflorum (Many-flowered thelypody) inhabits  sandy or deep silty soils. The pedicels are bent strongly upwards (this becomes more apparent as the flowers go to fruit, so early in the season look around for last year’s stems). Aven Nelson (1911), in his description of this species (from collections in Idaho), says the fruits are “normally strongly ascending or suberect, but often irregularly spreading as if from their weight.” The lower leaves are dentate—toothed or shallowly lobed, but not deeply lobed. The epithet “milleflorum” suggests it has “a thousand flowers.” Nelson offers no explanation and I haven’t counted, but clearly there could be several hundred flowers on a robust plant with several inflorescences (and the same could be said for T. laciniatum). This is a CNPS “List 2B.2” plant—”Rare or Endangered in California, common elsewhere. Fairly endangered in California.”

Thelypodium milleflorum

Sometimes Thelypodium milleflorum grows in dense stands like this; other populations are more dispersed.

Thelypodium milleflorum

Young stems of Thelypodium milleflorum. These will grow much taller and the racemes will develop many more flowers over the next 2 to 3 months.

Thelypodium milleflorum

Thelypodium milleflorum in soft, silty-sandy soil at the edge of a pinyon pine grove. It’s done flowering, but the fruits are still green.

Thelypodium milleflorum

See how the pedicels of Thelypodium milleflorum all curve up? (yellow arrows).

Good places to look for T. milleflorum include Goat Ranch Cutoff, Dobie Meadows Road, and probably other sandy places around the north and east margins of Mono Basin.

Thelypodium integrifolium is the most widespread of the species here — with five subspecies, its range extends throughout much of the desert and intermountain west. In the Bodie Hills, however, we have only one subspecies: T. integrifolium subsp. complanatum (Foxtail thelypody), which is the one seen from the eastern Sierra across most of central and northern Nevada. Its inflorescences are short and strongly congested at the ends of long, nearly naked branches. The flowers are usually a pale lavender-purple, sometimes white. It grows in moist to wet, alkaline or silty soils of meadows, creeks, and sometimes adjacent uplands.

Thelypodium integrifolium

Thelypodium integrifolium

I’ve seen it only along a wet ditch beside the road from Fletcher to Aurora (in Nevada), but there are a few other records from the Mono Basin. This is another CNPS “List 2B.2″ plant—”Rare or Endangered in California, common elsewhere. Fairly endangered in California.”

Thelypodium integrifolium

Thelypodium integrifolium

Not Thelypodium

Here are a few other plants that could trick you into thinking they might be a Thelypodium:

Stanleya pinnata

Stanleya pinnata is a very primitive mustard (with long gynophores). It has bright yellow flowers and pinnately lobed lower leaves.


Cleomella hillmanii (left) and Peritoma serrulata (right) are in the Cleomaceae, from which the primitive mustards may have evolved. These too have gynophores. Their compound leaves (with three leaflets) are very different from Thelypodium leaves.

Al-Shehbaz, Ihsan A. 1973. “The Biosystematics of the Genus Thelypodium (Cruciferae).” Contributions from the Gray Herbarium of Harvard University, no. 204 (1973): 3-148. This authoritative (145-page) reference on Thelypodium can be viewed page-by-page on JSTOR at http://www.jstor.org/stable/41764710 or downloaded as part of a larger PDF containing Nos. 203, 204, and 205 from the Biodiversity Heritage Library at https://www.biodiversitylibrary.org/item/122971#page/154/mode/1up.

Nelson, Aven 1911. “New Plants from Idaho.” Botanical Gazette 52, no. 4 (Oct., 1911): 261-274. PDF available at: https://doi.org/10.1086/330635.

Payson, Edwin B. 1922. “A Monographic Study of Thelypodium and Its Immediate Allies.” Annals of the Missouri Botanical Garden, Vol. 9, No. 3 (Sep., 1922), pp. 233-324. A half-century earlier study than Al-Shehbaz, but still relevant. A complete PDF is available from JSTOR at https://www.jstor.org/stable/2990054.

Copyright © Tim Messick 2018. All rights reserved.