Jensia yosemitana
Jensia
Yosemite tarplant, Yosemite tarweed
tarplant, tarweed
erect.
blades 10–50 × 1–2 mm.
mostly cauline;
proximal opposite (often crowded), distal alternate;
sessile;
blades spatulate to linear, margins entire or toothed, faces hirsute to strigose (distal leaves sometimes stipitate-glandular as well).
± obconic or urceolate to globose, 3–5 mm diam.
flat to convex, glabrous or setulose, paleate (paleae falling, in 1 series between rays and discs, connate, herbaceous to ± scarious).
2–8;
laminae 0.5–3 mm.
2–12, pistillate, fertile;
corollas yellow, sometimes purple-veined abaxially.
1–7.
1–65, functionally staminate;
corollas yellow, tubes shorter than funnelform throats, lobes 5, deltate (anthers ± dark purple; styles glabrous proximal to branches).
2–12 in 1 series (lanceolate to lance-attenuate, herbaceous, each usually wholly enveloping a ray ovary, abaxially hirsute, hair tips ± uncinate).
radiate, in ± umbelliform arrays.
compressed, clavate, arcuate, basal attachments oblique, faces glabrous, apices beaked.
-lucres broadly obconic, 2.5–4 mm.
bracts: pit-glands, tack-glands, and/or spines 0.
pappi crowns of scales (0.1–1 mm);
disc pappi of 5–7 (white or purple-tipped) subulate, crisped, ciliolate scales (2.5–3 mm).
= 8.
= 16.
Jensia yosemitana
Jensia
Of conservation concern.
Jensia yosemitana is known from widely scattered sites on the western slopes of the Sierra Nevada, at higher elevations than most populations of J. rammii.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Species 2 (2 in the flora).
Recognition of Jensia is based on evidence that Madia in the sense of D. D. Keck (1959) is not monophyletic; the epappose annuals constituting Madia in the restricted sense are more closely related to Carlquistia than to Jensia (B. G. Baldwin 1996).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
