11.
Cistanthe umbellata
(Torrey) Hershkovitz, Phytologia. 68: 268. 1990.
Spraguea umbellata
Torrey, Smithsonian Contr. Knowl. 6(2): 4, plate 1. 1853;
Calyptridium umbellatum
(Torrey) Greene;
C. umbellatum
var.
caudiciferum
(A. Gray) Jepson;
Spraguea umbellata
var.
caudicifera
A. Gray
Plants
perennial, taprooted; caudex branching.
Stems
1 from each rosette, ascending to erect, to 60 cm.
Leaves:
basal in 2-many prostrate rosettes, blade spatulate, (0.5-)2-7(-15) cm; cauline leaves usually absent.
Inflorescences
umbellate or subumbellate, dense, globose, 1-2 cm diam.
Flowers
subsessile; sepals orbiculate, equal, 3-8 mm, scarious; petals 4, white, 3-8 mm; stamens 3, anther red or yellow; style exserted, filiform; stigmas 2.
Capsules
globose, 2-3 mm; valves 2.
Seeds
1-8, black, orbicular-reniform, 0.7-1.2 mm, shiny.
2
n
= 44.
Flowering May-Oct. Dry sandy or gravelly soils; 1500-4300 m; B.C.; Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.
