G1? Critically Imperiled, Inexact Numeric Rank - Critically imperiled globally because of extreme rarity or because of some factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) or acres (<2,000) or linear miles (<10).
The ranking is inexact.
Diminutive, tufted, strigulose perennial forming clumps up to 3 dm across; stems up to 1 cm long; leaves crowded, up to 4 cm long, odd-pinnate, leaflets 7-11, oblong-elliptic, 0.7-2.0 mm long, petiole and rachis forming persistent spines after fall o...
Acrocarpic moss to 3 mm tall and 2 mm wide, the stems not or sparingly branched; central strand absent; leaves distichous, equitant, consisting of 2 laminae that clasp the stem, arranged on edge to the stem and split at the base, to 1.5 mm long and 0...
Long-lived perennial, suffrutescent from a woody branching base, sometimes sprouting shoots from thick, lateral roots; stems up to 25 cm tall, puberulent or glabrescent at the base and glabrous for at least the upper two-thirds; leaves linear to line...