Pentachaeta alsinoides
Bull. Torrey Bot. Club 9: 109. 1882.
Common names: Tiny pentachaeta
IllustratedEndemic
Synonyms: Chaetopappa alsinoides (Greene) D. D. Keck
Revision as of 21:03, 29 July 2020 by imported>Volume Importer
Plants 3–14 cm. Stems diffusely branched. Leaf-blades linear to filiform, 15–35 × 0.5–1 mm. Involucres narrowly obconic. Phyllaries in 2 series, elliptic, glabrous or sparsely hirsuto-pilose. Ray (or pistillate) florets (4–) 5 (–6); corollas yellow to red-tipped, laminae 0–1 mm. Disc-florets (3–) 4 (–5); corollas yellow, often reddish-tipped, linear-tubular, not contracted at lobes, lobes 3. Pappi of 3 (–4) bristles, weakly dilated at bases. 2n = 18.
Phenology: Flowering Apr–May.
Habitat: Grassy areas
Elevation: 15–400 m
Discussion
Pentachaeta alsinoides is easily recognized by its relatively small (2.6–3 mm), disciform heads and reddish, linear-tubular, 3-lobed disc corollas. The anthers of the disc florets often are sterile.
Selected References
None.
Lower Taxa
None.
... more about "Pentachaeta alsinoides"
introrse +
connate +
distinct +
herbaceous +
scarious +
hirsute +
papillate +
continuous +
decurrent +
narrowly oblanceolate;linear or filiform +
ribbed +
stigmatic +
barbellate +
tawny +
persistent +
absent +
Tiny pentachaeta +
reddish-tipped +
not contracted +
absent +
linear-tubular +
monomorphic +
(3-)5-ribbed +
dimorphic +
strigose +
staminate +
Calif. +
straight +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
singly +
indeterminate +
Present +
surrounding +
obconic +
linear;filiform +
0.5mm;1mm +
sessile +
alternate +
erect +
triangular +
hyaline +
delimited +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
dilated +
tough +
thick +
absent +
connate +
1-nerved +
elliptic +
persistent +
distinct +
herbaceous +
falling +
unequal +
Bull. Torrey Bot. Club +
1882 +
pistillate +
absent +
fertile +
epaleate +
pitted +
flat;slightly convex +
fibrous +
exalbuminous +
modifed +
absent +
unequal +
equal +
alternate +
branched +
2-branched +
glabrous +
Pentachaeta alsinoides +
Pentachaeta +
species +
shorter +
annual +