Jensia
tarplant, tarweed
erect.
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).
2–12, pistillate, fertile;
corollas yellow, sometimes purple-veined abaxially.
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.
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.
Jensia
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.)
1. Plants 6–60 cm; involucres urceolate or globose; ray florets 5–12, laminae 4–10 mm; discflorets 16–65 | J. rammii |
1. Plants 5–25 cm; involucres broadly obconic; ray florets 2–8, laminae 0.5–3 mm; disc florets1–7 | J. yosemitana |
CA
WildflowerSearch
iNaturalist
USDA Plants Database
