Limnanthes floccosa

Howell

Fl. N.W. Amer., 108. 1897.

Common names: Woolly meadowfoam
IllustratedEndemic
Treatment appears in FNA Volume 7. Treatment on page 182. Mentioned on page 174, 179, 180, 183.

Plants 3–25 cm; herbage glabrous or sparsely to densely hairy. Stems erect to ascending or decumbent. Leaves 1–8 cm; leaflets 5–11, blade linear to ovate-elliptic, margins entire, irregularly toothed, or lobed. Flowers urn-, cup-, or bell-shaped; sepals accrescent or not, ovate, obovate, lanceolate, oblong-lanceolate, or lanceolate-ovate, 4–10 mm; petals white, obovate, oblong, or obovate-cuneate, 4.5–10 mm, 1.6–1.8 times as long as wide, 0.5–1.1 times longer than sepals, apex retuse, obtuse, erose, truncate, or emarginate; filaments 2–7 mm; anthers (yellow) 0.4–1.5 mm; style 1.5–4 mm. Nutlets dark brown or gray, 3–4.5 mm, tuberculate, tubercles straw-colored, platelike, conic, or awl-shaped.

Discussion

Subspecies 5 (5 in the flora).

Key

1 Flowers bell- or urn-shaped (petals without marginal hairs basally); anthers usually dehiscing introrsely > 2
1 Flowers cup-shaped (petals with marginal hairs basally); anthers usually dehiscing extrorsely (introrsely in subsp. pumila) > 3
2 Sepals abaxially and adaxially densely villous; nutlet tubercles awl-shaped. Limnanthes floccosa subsp. floccosa
2 Sepals abaxially and adaxially glabrous or sparsely hairy; nutlet tubercles platelike. Limnanthes floccosa subsp. bellingeriana
3 Herbage densely hairy; sepals abaxially densely hairy. Limnanthes floccosa subsp. californica
3 Herbage glabrous or sparsely hairy; sepals abaxially glabrous or sparsely hairy > 4
4 Sepals not accrescent, 7.5-8 mm, adaxially glabrous. Limnanthes floccosa subsp. pumila
4 Sepals accrescent, 8.5-9 mm, adaxially densely hairy. Limnanthes floccosa subsp. grandiflora