268 Onagraceae 
subclavate, obtuse, membranous, not sessile. Seeds in | row in each cell. (Probably Gk. 
chylos=plant juice. Why?) 
A. Flowers yellow; calyx-tube 2—4 mm. long; petals 4—6 mm. long. E. 
C. scapoidea Small 
AA. Flowers rose-colored; calyx-tube 4—6 mm. long; petals 6—8 mm. long. E. 
C. cruciformis How. 
GAYOPHYTUM 
Annual; stem branched, very slender. Leaves entire, linear. Flowers axillary. 
Calyx-tube not produced beyond the ovary; calyx-segments 4, deciduous, reflexed. Petals 
4, white or rose-colored, very small, ovate or oval, very short-clawed. Stamens 8, 4 
shorter and usually sterile; anthers attached by the middle. Ovary 2-celled; stigma capi- 
tate or clavate. Capsule membranous, clavate, 2-celled, 4-valved. Seeds few to many, 
in | row in each cell, oblong, smooth. (Probably Gk. gaios=on land, phyton—plant. ) 
A. Seed hairy. 
B. Stems 2—3 dm. high; petals about 2 mm. long; pod scarcely torulose. C. E. 
G. lasiospermum Gr. 
BB. Stems 3—5 dm. high; petals 6—8 mm. long; pod torulose. E. 
G. eriospermum Cov. 
AA. Seed glabrous. 
C. Capsule nearly sessile; branches nearly all from near the base of the stem. C. E. 
(G. pumilum; G. caesium.) 
G. racemosum T. & G. 
CC. Capsules on elongated pedicels; branches mostly from the upper part of the 
stem. 
D. Flowers 5—12 mm. wide. E. 
G. diffusum T. & G. 
DD. Flowers 2—4 mm. wide. C. E. 
G. ramosissimum T. .& G. 
GAURA 
Annual or biennial or perennial; stems somewhat woody at base in ours; 6—15 dm. 
high, villous-pubescent with whitish hairs. Leaves alternate, sessile, narrow; leaves in 
ours ovate-lanceolate, acute or acuminate, repand-denticulate, barely petioled, soft-pubes- 
cent. Flowers white or pink (ours) or red, in terminal spikes (ours) or racemes. Calyx 
usually pubescent; calyx-tube narrow, prolonged beyond the ovary, deciduous; calyx- 
lobes 3—4 (ours 4). Petals 3—4 (ours 4), unequal. Stamens usually 8. Ovary 
|-celled; stigma 4-lobed, surrounded by a cup-like border. Fruit nut-like, ribbed or 
angled, indehiscent or nearly so. Seeds 1—4, unappendaged. (Gk. gauros—superb; 
some species have rather fine flowers.)  E. 
G. parviflora Dougl. (Small-flowered Gaura) 
HETEROGAURA 
Annual; stems 3—4.5 dm. high (ours). Leaves alternate; in ours entire, lanceolate, 
petioled, 2.5——5 cm. long. Flowers small, in terminal racemes. Calyx-tube obconic; 
calyx-segments 4, spreading, deciduous. Petals 4, entire, clawed: in ours purple, 4 mm. 
long. Stamens 8, 4 shorter. Ovary 4-celled; cells l-ovuled; stigma disk-like, entire. 
Fruit nut-like, indehiscent, obovoid, 2—4-celled, 1—2-seeded. (Gk. heteros—unlike 
or different, +Gaura.) U.  H. californica Rothr. 
