Physaria lepidota

Physaria lepidota, the Kane County twinpod, is a plant species endemic to Utah. It is known only from Kane, Washington, and Garfield Counties in the southern part of the state.[2] It grows on rocky slopes and outcrops, and sometimes in disturbed areas.[3]

Physaria lepidota
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Brassicales
Family: Brassicaceae
Genus: Physaria
Species:
P. lepidota
Binomial name
Physaria lepidota
Rollins
Synonyms[1]

(for subsp. membranacea)

  • Physaria chambersii var. membranacea Rollins
  • Physaria lepidota var. membranacea (Rollins) Rollins

Physaria lepidota is a perennial herb with most of the above-ground parts covered with a silvery pubescence. Stems branch at the base but rarely above, sometimes reaching a height of 20 cm (8 inches). Flowers are yellow, born in a dense raceme. Fruits are highly inflated, up to 20 mm (0.8 inches) across with purplish papery walls.[4][5]

Subspecies

Despite the limited range of the species, two subspecies are generally recognized, differing in the shapes of the fruits and of the hairs in the pubescence:[6][7]

Physaria lepidota subsp. lepidota

and

Physaria lepidota subsp. membranacea

The two subspecies also differ in chromosome number (2n=16 for subsp. lepidota, 2n=8 for subsp. membranacea).[3]

gollark: Again, Dave has been dealt with.
gollark: Dave has been dealt with.
gollark: I saw that yesterday and SIMILARLY complained that it's not well-defined.
gollark: So if you have an object with the left half in shadow or something, even though a camera sees each side as having *wildly* different colors, you'll just think "oh, that's yellow" or something like that.
gollark: Human color processing isn't measuring something like "what amounts of reddish/greenish/blueish light is falling on this set of cones", it's trying to work out "what object is this and what are the lighting conditions".

References
  1. The Plant List
  2. USDA Plant Resources Conservation Service, Plants Profile
  3. Flora of North America v 7 p 648.
  4. Rollins, R. C. 1981. Studies in the genus Physaria (Cruciferae). Brittonia 33(3): 332–341.
  5. Holmgren, N. H., P. K. Holmgren & A.J. Cronquist. 2005. Vascular plants of the intermountain west, U.S.A., subclass Dilleniidae. 2(B): 1–488. In A.J. Cronquist, A. H. Holmgren, N. H. Holmgren, J. L. Reveal & P. K. Holmgren (eds.) Intermountain Flora. Hafner Publishing Co., New York.
  6. O'Kane, Steve Lawrence. Novon 17(4): 531. 2007.
  7. Rollins, Reed Clark. Studies in the genus Physaria (Cruciferae). Brittonia 33(3): 338. 1981.
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