i ae Boraginaceae 
lar, 5-lobed, sometimes with appendages in the throat. Stamens as many as the corolla- 
lobes and alternate with them, on the tube or throat of the corolla. Disk usually con- 
spicuous. Ovary superior, usually of 2 or 4 somewhat globose lobes with a common 
style from between them, but sometimes of | unlobed ovary with terminal style; ovules 4; 
style entire to 2-parted. Fruit of two 2-seeded carpels or of four |-seeded nutlets. 
A. Ovary undivided, sometimes 2—4-grooved; style at tip of ovary. 
B. Plant hairy, prostrate, annual; leaves ovate to rounded, 4—-8 mm. long; style 
2 cleft or -parted. COLDENIA (p. 323) 
BB. Plant glabrous, spreading, perennial; leaves obovate to linear, 25—50 mm. 
long; style entire or none. HELIOTROPIUM (p. 323) 
AA. Ovary 4-cleft or -divided; style arising from between the parts of the ovary. 
C. Prickles of the nutlets barbed. 
D. Nutlets spreading, prickly all over; flowers blue. CYNOGLOssUM (p. 323) 
DD. Nutlets erect, prickly on the margin and sometimes on the back; flowers va- 
riously colored. LAPPULA (p. 324) 
CC. Prickles of the nutlets hooked; flowers white. PEcTocarRYA (p. 323) 
CCC. Prickles of the nutlets neither barbed nor hooked, or none at all. 
E. Nutlets attached laterally to a pyramid-like projection of the receptacle. 
F. Calyx with 5 wide flat lobes and 5 smaller ones alternating with them; 
corolla blue. ASPERUGO (p. 329) 
FF. Calyx simply 5-lobed, without the 5 smaller alternating ones. 
G. Lower leaves opposite. ALLOCARYA (p. 325) 
GG. Leaves all alternate. 
H. Flowers yellow. 
I. Annual; scar of nutlets ovate or oblong; throat of corolla naked or 
merely with hairy tufts within. AMSINCKIA (p. 328) 
II. Biennial or perennial; scar of nutlets very slender; throat of the 
corolla with prominent folds within. OREOCARYA (p. 327) 
HH. Flowers white. 
J. Stems repeatedly dichotomously branched; annual. 
K. Sepals distinct to the base; ventral groove of the nutlets not 
forked at base; most of the leaves in a basal tuft. 
EREMOCARYA (p. 326) 
KK. Sepals distinct to the middle; ventral groove of the nutlets 
forked at base; leaves scattered, not mostly basal. 
PIPTOCALYX (p. 326) 
JJ. Stems not dichtomously branched; annual or perennial. 
Annual; pedicels persistent; leaves mostly in a basal tuft; nut- 
lets keeled on both sides. PLAGIOBOTHRYs (p. 326) 
LL. Biennial or perennial; pedicels persistent; leaves scattered along 
the stem; nutlets not keeled. OREOCARYA (p. 327) 
LLL. Annual; pedicels deciduous (except in C. pterocarya) ; leaves 
scattered along the stem; nutlets not keeled (except some in C. 
pterocarvya. ) . CRYPTANTHE (p. 327) 
HHH. Flowers blue or purple or pink. 
M. Nutlets erect; corolla tubular-funnelform; plant not conspicuously 
white-hairy nor silvery-hairy. MERTENSIA (p. 329) 
MM. Nutlets ascending to horizontal; corolla rotate or salverform; 
plant conspicuously silvery- or white-hairy. ERITICHIUM (p. 325) 
EE. Nutlets attached by the very base. 

