Stems erect, unbranched; scales brown, lanceolate, 3--6 × 1--1.5 mm, margins entire; leaves monomorphic; petiole brown to straw-colored, dull, 3--10 cm, 1/8--1/4 length of blade; indument of brown, narrowly lanceolate scales; blade linear, simple, 8-...
Perennial; plants low, tufted, stemless or with short stem (0-4(6) cm long), stems prostrate; herbage usually silvery; foliage densely strigose with rather coarse straight and parallel, appressed, dolabriform hairs; stipules not connate; leaves 2-6.5...
Taprooted perennial, mat-forming, 10-70 cm in diameter; leaves mostly basal, spreading or ascending, 8-30 in rosettes at ends of caudex branches, oblanceolate to narrowly obovate or spatulate, 8-23 mm long, 2-7 mm wide, round or obtuse at the tip, mo...
Annual, 1-2 m tall, branched above, stem glabrous to hispid; leaves opposite below, alternate above, up to 17.5 cm long by 8.5 cm wide, lanceolate with 3 prominent veins, base tapering to a short petiole, margins entire except for a few prominent tee...
Annual (?); stem slender, unbranched, about 0.9 m tall, sparingly coarse-strigose; leaves opposite to mid-stem, alternate above, narrowly linear-lanceolate, about 6 cm long, 6 mm wide, acute, entire, narrowly attenuate to a sessile base, thinly appre...
Perennial herb; stems several from the base, white, stout, leafy, 2.2-8 dm tall, sparsely covered with minute, reflexed or spreading barbed hairs; basal leaves not persistent; stem leaves entire or with a few short laciniate lobes, linear to narrowly...
Annual; herbage strongly glandular and sticky; stems 1-3.4 dm tall, erect, simple or branched at base, with simple setose, hirsute and multicellular glandular hairs; leaves lanceolate, serrate, dentate to shallowly lobed, 1-4 cm long, 0.5-2 cm wide, ...
Biennial, 20-37 cm tall; stems solitary to several, usually erect, leafy, densely covered with sessile to short-stalked, 3-celled, light-colored capitate glands with some short and longer simple nonglandular hairs; leaves 1-6 cm long, 0.5-2 cm wide, ...
Long-lived, low growing perennial with diffusely branching root crown (caudex) forming mounded clumps 1-3 dm in diameter; herbage densely covered with overlapping gear-shaped (stellate-discoid) trichomes; stems 3-10 cm long; basal leaves narrowly obl...
Dwarf annual with 1 to many stems; leaf blades about 1 mm broad, flat or involute, short; culms mostly 5-15 cm tall; panicle narrow, few-flowered, the branches erect-appressed; spikelets 4-6 mm long; glumes shorter than the first floret, broad, stron...