Eriogonum subg. Micrantha

(Bentham) Reveal in J. E. Gunckel

in J. E. Gunckel, Curr. Topics Pl. Sci., 237. 1969.

Basionym: Eriogonum sect. Micrantha Bentham Trans. Linn. Soc. London 17: 413. 1836
Treatment appears in FNA Volume 5. Treatment on page 325. Mentioned on page 221, 223.

Herbs, biennial or annual, polygamodioecious, floccose to tomentose; taproot somewhat woody. Stems erect, without persistent leaf-bases, pubescent; caudex stems absent; aerial flowering-stems erect, slender to stout, solid, not disarticulating in ringlike segments proximally, arising directly from the root. Leaves persistent or marcescent, in basal rosettes or fasciculate and scattered along stems, 1 per node; blade usually tomentose. Inflorescences terminal, cymose, compact to open; branches dichotomous, round, smooth, tomentose to floccose; bracts 3, connate basally, scalelike. Peduncles absent or erect, slender. Involucres 1 per node, not appressed to inflorescence branches, turbinate to campanulate; teeth 5–6, erect, apex acute. Flowers not attenuate at base, without stipelike base; perianth white to cream, rose, or reddish-brown, glabrous abaxially, densely pubescent and minutely glandular adaxially; tepals connate proximally 1/4–1/3 their length, dimorphic; stamens included or slightly exserted; filaments pilose proximally. Achenes brown, not winged, 3-gonous, glabrous. Seeds: embryo curved.

Distribution

c North America, including n Mexico

Discussion

Species 2 (2 in the flora).

Selected References

None.

Key

1 Outer tepals obovate, 0.9-1.5 mm wide; involucres 2.5-4 mm, tomentose to floccose abaxially, glabrous adaxially; plants grayish Eriogonum annuum
1 Outer tepals oblong-cordate, 1.5-2 mm wide; involucres 2-2.5 mm, usually tomentose on both surfaces; plants reddish Eriogonum multiflorum

"/2" is not declared as a valid unit of measurement for this property.

... more about "Eriogonum subg. Micrantha"
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
(Bentham) Reveal in J. E. Gunckel +
deciduous +  and persistent +
stipelike +
Eriogonum sect. Micrantha +
awn-tipped +  and simple +
linear;orbiculate +
not awn-tipped +
glandular +, pubescent +  and glabrous +
scale-like +
not brittle +
tomentose +  and floccose +
scabrellous +
spreading +  and erect +
whorled +, opposite +  and alternate +
c North America +  and including n Mexico +
unisexual +, , +  and bisexual +
not attenuate +
not disarticulating +  and solid +
decumbent to erect +  and prostrate +
slender;stout +
unwinged +  and winged +
black +, red +, brown +  and yellowish +
exserted +  and included +
pubescent +  and glabrous +
spheroidal +, 4-gonous +, lenticular +, biconvex +, discoid +, 3-gonous +  and 2-gonous +
compact +  and open +
capitate +  and subcapitate +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
turbinate +  and campanulate +
nonmembranous +
in whorls +, opposite +, alternate +  and rosulate +
marcescent +
persistent +
cauline +  and basal +
bractlike +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
white;cream rose or reddish-brown +
pubescent +  and glabrous +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
homostylous +  and 3-carpellate +
in J. E. Gunckel, Curr. Topics Pl. Sci., +
, +  and solid +
slender;stout +
persistent +
exserted +  and included +
decumbent to erect +  and prostrate +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
2-lobed +  and cylindric +
coriaceous +  and membranous +
consisting of a series +  and tubular +
distinct +
erect;spreading or recurved +
spreading;erect +
chambered +  and solid +
slender +  and stout +
Eriogonum subg. Micrantha +
Eriogonum +
subgenus +
emarginate +  and entire +
1/4 +  and 1/3 +
lobed +  and laciniate +
coriaceous +
persistent +
membranous +
pubescent +  and glabrous +
annual +  and biennial +
floccose +  and tomentose +
3 +, 2 +  and 1 +