Porophyllum ruderale var. macrocephalum
Madroño 20: 255. 1970.
Basionym: Porophyllum macrocephalum de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 648. 1836
Synonyms: Porophyllum ruderale subsp. macrocephalum (de Candolle) R. R. Johnson
Treatment appears in FNA Volume 21. Treatment on page 234.
Annuals, 15–50+ cm; internodes mostly 15–30+ mm. Leaf-blades oval or elliptic to obovate, 15–35+ × 8–25+ mm. Phyllaries 5, linear, 15–25+ mm. Florets mostly 30–50+; corollas greenish to purplish, 9–12.5 mm. Cypselae 9–12 mm; pappi: longer bristles 7–10 mm. 2n = 22.
Phenology: Flowering late summer–fall.
Habitat: Ephemerally wet sites in desert mountains
Elevation: 1000–1500 m
Distribution
Ariz., N.Mex., Tex., Mexico, West Indies (Antilles), Central America, South America
Discussion
Selected References
None.
Lower Taxa
None.
"fine" is not a number.
... more about "Porophyllum ruderale var. macrocephalum"
introrse +
connate +
herbaceous +
scarious +
absent +
hirsute +
papillate +
continuous +
decurrent +
orbiculate;linear or filiform +
winged;ribbed;winged;ribbed +
1;22 +
stigmatic +
50;100 +
25;50 +
coarse +
absent +
zygomorphic +
monomorphic +
dimorphic +
9mm;12mm +
staminate +
straight +
glabrous +
distinct +
proximal +
30;50 +
bisexual +
dispersed +
cylindric +
singly +
discoid +
indeterminate +
surrounding +
cylindric;campanulate +
elliptic;obovate +
8mm;25mm +
cauline +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
falling +
absent +
coroniform +
tough +
thick +
absent +
connate +
persistent +
distinct +
falling +
unequal +
Madroño +
1970 +
pistillate +
absent +
fertile +
epaleate +
pitted +
convex;conic +
fibrous +
exalbuminous +
modifed +
1;2 +
alternate +
branched +
erect +
2-branched +
papillate +
Porophyllum ruderale var. macrocephalum +
Porophyllum ruderale +
variety +
cylindric +
stout +
much shorter +
much longer +
annual +