EVENING PRIMROSE FAMILY 203 



2. Flowers 1-2 cm. wide; fruit 4-angled 



a. Stems .5-2 ft. high ; flowers more or less red G. coccinea 



b. Stems 2-5 ft. high ; flowers white to pink G. biennis 



GAURELLA Small 1896 

 (Diminutive of Gaura) 



Sepals 4, united into a cylindric tube, purplish, petals 4, white or pink, 

 stamens 8, the alternate ones longer, ovary 4-angled, stigmas linear, capsule 

 ovoid-pyramidal, beaked, 4-angled; flowers solitary, axillary; leaves alter- 

 nate, simple; perennial. 



Stems spreading, 4-8 in. high, grayish; leaves lance- 

 linear, entire or toothed, 1-2 cm. long; flowers 2-2.5 

 cm. wide G. cane sc ens 



GAYOPHYTUM Jussieu 1832 

 (From Gay, a botanical traveller, and Gr. phyton, plant) 



Sepals 4, united into a tube, not prolonged beyond the ovary, lobes re- 

 flexed, petals 4, white or rose, stamens 8, alike or sometimes in 2 sets, 

 stigma globose to club-shaped, capsule linear to club-shaped; flowers soli- 

 tary, axillary; leaves alternate, entire, linear; annual. 



1. Pods on stalks 1-2 mm. long G. caesium 



2. Pods on stalks usually 5-15 mm. long 



a. Flowers 5-10 mm. wide ; stigma club-shaped G. diffusum 



b. Flowers 2-4 mm. wide ; stigma globose G. ramosissimum 



L,AVAUXIA Spach 1835 

 (Named for Delavaux, a French botanist) 



Sepals 4, united into a tube several times longer than the ovary, petals 

 4, white, pink or yellow, separate, stamens 8, the alternate longer, ovary 4- 

 celled, 4-winged, stigma 4-cleft; flowers solitary; leaves basal, pinnatifid; 

 stemless perennial or annual. 



1. Flowers 1-2 in. wide, yellow then pink; fruits 



beaked L. triloba 



2. Flowers 3-4 in. wide, yellow ; fruits not beaked L. brachycdrfa 



MERIOLIX Rafinesque 1818 

 (Of doubtful origin and meaning) 



PI. 32, fig. 3. 



Sepals 4, united into a tube shorter than the ovary, petals 4, separate, 

 yellow, stamens 8, ovary 4-celled, 4-angled, stigma disk-like, 4-toothed, 

 pods linear, 4-angled; flowers axillary, solitary, regular; leaves alternate, 

 entire or toothed; biennial or perennial. 



