Boraginaceae 325 
L. Marginal fruit-prickles united at base; corolla appendages hairy. 
M. Plant ashy-gray; basal leaves 6—10 mm. long; calyx-lobes acute; corolla 
6—7 mm. wide; inner face of the nutlets smooth. E. 
L. cinerea Pip. 
MM. Plant not so; basal leaves 8—20 cm. long; calyx-lobes obtuse; corolla 
10—12 mm. wide; inner face of the nutlets rough or hairy. E. (L. cot- 
toni.) L. arida Pip. 
LL. Marginal fruit-prickles free to the base. 
N. Corolla-appendages puberulent, wider than long; dorsal fruit-prickles not 
shorter than the marginal ones. (See KK.) 
NN. Corolla-appendages merely papillate, not wider than long; dorsal fruit- 
prickles shorter than the marginal ones. E. 
L. hendersoni Pip. 
ERITRICHIUM 
Annual or perennial, low, hairy. Leaves 2 cm. or less long, largely basal and 
petioled. Flowers small, white or blue (ours). Calyx open and but little enlarged 
in fruit. Corolla-tube short; limb somewhat rotate; appendages almost closing the throat. 
Stamens included. Ovary 4-lobed. Nutlets obliquely ascending, or depressed and 
nearly horizontal, with truncate-campanulate back; border acute, winged or at length 
revolute, entire or dentate or spinulose. (Gk. erion=wool; thrix—hair; referring to the 
hairy herbage.) 
A. Basal leaves linear-spatulate; corolla 8—10 mm. wide; nutlets wingless, the snarp 
edge entire; plant with short silky hairs. C. (E. elongatum.) 
E. howardi Rydb. 
AA. Basal leaves lanceolate to ovate; corolla 4—6 mm. wide; nutlets winged, the 
wing toothed or lobed; plant with long shaggy hairs. C. E. (E. aretioides.) 
E, argenteum Wight 
ALLOCARYA 
Low, mostly annual. Leaves entire, the lowest always opposite. Flowers in scor- 
poid racemes, rather small; pedicels with top-shaped thickening. Calyx-segments spread- 
ing, somewhat enlarged in fruit. Corolla salverform; tube short; throat yellow; limb 
white. Nutlets ovate to lanceolate, crustaceous, opaque or vitreous-shining, smooth or 
variously tuberculate and rugose-muriculate or even glochidiate, often carinate on one or 
both sides, attached to a low gynobase; scar medial to basal or elevated. (Gk. allos—= 
another, karyon—a nut; that is, another kind of nutlet.) 
A. Corolla 6—10 cm. wide. 
B. Perennial by creeping and rooting stems, abundantly soft-villous. E. 
A. mollis Gr. 
BB. Annual, often appressed-hairy but not villous. 
C. Pedicels 8—17 mm. long; racemes leafy-bracted below. W. 
A. chorisiana Gr. 
CC. Pedicels 2—-3 mm. long; racemes bractless or some with small bracts below. 
D. Bristly thruout with spreading or somewhat reflexed hairs. U. 
A. hirta Gr. 
DD. Not bristly, hairs appressed. 
E. Nutlets not stiptate. W. E. 
A. scouleri Gr. 
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