Perennial; stems erect or ascending, clustered, 3-9 dm long, glabrate or strigose to inflorescence; petioles 1-3 cm long; leaves trifoliolate; leaflets oblong-lanceolate, the terminal longest, to 3-6 cm, generally about 1 cm wide, 4-5 times longer th...
Winter annuals or biennials (perennial?); taproots enlarged above; stems 1 to several, usually with several branches 1.5-3.5 dm long, pubescent at base with simple trichomes, glabrous above ;leaves mostly in flat basal rosettes, denticulate to dentat...
Prostrate annual herb with several primary stems extending radially from a slender taproot; stems to 15 cm long, terete, strigulose with white recurved hairs 0.1-0.2 mm long, internodes 0.6-2.2 cm long; leaves opposite, stipules interpetiolar, separa...
Annual or biennial; stems 1-4 from an herbaceous base, loosely corymbosely branched, mostly suffused with reddish-purple, 2-7 dm tall; leaves rather thin, dull green, denticulate to coarsely dentate, ovoid-oblong to lanceolate, usually subamplexicaul...
Subrhizomatous perennial; stems 1-4 dm tall; leaves mostly basal, oblanceolate to obovate, dentate towards apex, lightly tomentose or glabrate at maturity; stem leaves few and much reduced upwards; heads radiate, erect, several to many in a corymbose...
Root large, fleshy, round at the top, tapering; stems 2 m long, pale gray-green, slender, 1-2.5 cm in diameter, strongly angled by the 4-6 low, broad ribs; areoles narrowly oval about 4 mm long, white to gray woolly, bearing approximately 12 gray to ...
Plants perennial, mat-forming; stems 1-5 dm tall, tufted, leafy, pubescent; leaves oblanceolate, 2-4 mm wide (possibly with flattened, scale-like, appressed hairs); inflorescence glandular; corolla (probably) blue-lavender, 16-20 mm long, floor 2-rid...
