Onagraceae 267 

| A. Leaves deeply pinnatifid. 
, B. Plant white-pubescent. FE. (T. tanacetifolia; T. longiflora. ) 
T. breviflora Nutt. 
BB. Plants glabrous or nearly so. E. 
T. heterantha taraxacifolia Small 
AA. Leaves entire to repand-denticulate. 
C. Plant perennial, glabrous or somewhat pubescent; leaves oblong-lanceolate. 
D. Plant glabrous; leaves oblong-lanceolate; capsule 1.52 cm. long; seeds 
many. FE. (7. subacaulis.) 
T. heterantha Small 
DD. Plant somewhat pubescent: leaves ovate to oblong-lanceolate; capsule 1.2 
em. long; seeds few. E. T. ovata Small 
CC. Plant annual, villous; leaves linear. FE. 
T. gracilliflora Raim. 
SPHAEROSTIGMA 
Annual or perennial; stems present. Leaves alternate, entire or denticulate or pin- 
natifiid (not ours). Flowers solitary or in spikes, white or rose-colored or yellow. Ca- 
lyx-tube obconic or shortly funnelform: calyx-segments 4, reflexed. Petals 4, entire or 


emarginate. Stamens 8, somewhat unequal. Stigma capitate, entire. Capsule linear or 
elongated, sessile or stalked, terete or 4-angled, straight or contorted, 4-celled. Seeds in 
I row in each cell, ovate to linear-oblong, smooth or nearly so. (Gk. sphaira— sphere, 
+-stigma ; because the stigma is capitate. ) 
A. Flowers yellow or yellowish, sometimes turning red or green, axillary in most spe- 
cles. 
B. Capsule linear, more or less contorted. 
C. Stem glabrous; leaves 6—18 mm. long, linear to lanceolate; petals 2-4 mm. 
long; capsule 16—27 mm. long. W. E. (S. contorta pubens; S. contorta 
greene. ) S. contorta Walp. 
CC. Stems not glabrous; leaves longer, often wider; petals 6—8 mm. long. 
D. Stem puberulent; capsule 20—25 mm. long. E. 
S. implexa, Nels. 
DD. Stem pubescent; capsule 8—16 mm. long. U. 
S. spirale Walp. 
BB. Capsule attenuate upward from a wider base, straight. 
FE. Seeds pale, linear; flowers barely 2 mm. long. E. 
S. andinum Walp. 
EE. Seeds dark, obovate, clavate; flowers 2-4 mm. long. E. 
S. hilgardi Small 
AA. Flowers white or rose-color, in nodding spikes. ; 
F. Leaves oblanceolate, 2.5—-7.5 cm. long. E. (S. alvssoides for our region; 
S. alyssoides minutiflorum; S. minutiflorum. ) 
S. tortum Nels. 
FF. Leaves ovate, 1.2—2.5 cm. long. E. 
S. boothii Walp. 
CHYLISMA 
Annual; stems present. Leaves simple or pinnate. Flowers yellow or rose-colored, 
in terminal racemes. Calyx-tube funnelform or obconic; calyx-segments 4. Petals 4, 
entire. Stamens 8, unequal. Stigma capitate, entire. Capsule linear, subcylindric or 

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