Flora of North America species comparison

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Kyhosia

kyhosia, tarweed
Habit Perennials, 50–120 cm (rhizomatous; self-incompatible).
Stems

(aerial) erect.
Leaves

basal and cauline (at flowering);

proximal opposite (basalmost in rosettes), distal alternate;

sessile;

blades lance-linear to linear, margins entire, faces hirsute and (distal leaves) glandular-hirtellous.
Involucres

± campanulate to hemispheric, 6–12+ mm diam.
Receptacles

flat to convex, glabrous, paleate (paleae falling, in 1 series between rays and discs, weakly connate or distinct).
Ray florets

8–12, pistillate, fertile;

corollas bright yellow.
Disc florets

28–65, bisexual and fertile;

corollas bright yellow, pubescent, tubes shorter than funnelform throats, lobes 5, deltate (anthers ± dark purple; styles glabrous proximal to branches).
Phyllaries

8–12 in 1 series (each mostly or wholly enveloping a ray ovary, lanceolate to lance-linear, herbaceous, abaxially hirsute and glandular-hirtellous).
Heads

radiate, borne singly or in loose, ± corymbiform arrays.
Disc cypselae

(brown to black) ± terete (straight or arcuate, faces hispidulous, otherwise similar to rays);

pappi of 5–10 (stramineous to purplish) lanceolate to subulate, ciliate to plumose scales.
Ray cypselae

(black) compressed, clavate (arcuate, basal attachments centered, apices beakless, faces glabrous or hispidulous);

pappi 0, or coroniform.
Peduncular

bracts: pit-glands, tack-glands, and/or spines 0.
x

= 6.

Kyhosia
Distribution
from USDA
w United States
[BONAP county map]
Discussion

Species 1.

Kyhosia has been treated as congeneric with Madia, which is evidently more closely related to the Hawaiian silversword alliance (Argyroxiphium, Dubautia, and Wilkesia) than to Kyhosia (B. G. Baldwin 1996). Head architecture is similar in Kyhosia and Argyroxiphium, as noted by S. Carlquist (1959). Kyhosia is the only perennial tarweed with 2n = 12.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 21, p. 295. Authors: Bruce G. Baldwin, John L. Strother.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Madiinae
Subordinate taxa
K. bolanderi
Name authority B. G. Baldwin: Novon 9: 465. (1999)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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