480 FLORA OF TEXAS. 



Stigmas many-parted. Flowers spiked. Bracts of the pistillate floxoers leafy, toothed. 



ACALTPHA. 



Stigmas 3, simple. Flowers racemed. Bracts small and entire Teagia. 



tt Staminate Jloivers (except Ceotok M-VRITimum), or the pistillate flowers also furnished 



with petals. 



Pistillate flowers apetalous, or with minute petals. Stamens 6 or more, distinct.. CfiOToy. 

 apetalous. Capsule 1-celled. Stamens 5, distinct Cbotonopsxs. 



*** Flowers cymose or panicled, apetalous. 



Flowers cymose. Calyx white, corolla-like Cnxdoscolur. 



in crowded panicles. Calyx herbaceous Eicnajs. 



§ Ovules, and commonly the seeds, 2 in the cells. 



* Flowers monoecious, apetalous ; ovary 3-celled ; Tierbs. 



Flowers axillary. Calyx 5-6-parted. Stamens 3, monadelphous PHnxANTHUS. 



spiked. ^.-parted. 4t, distinct Pachtsandha. 



** Flowers dioecious, apetalous; ovary 2-celled; shrubs. 



Flowers in axillary clusters. Fruit drupaceous, l<elled, 1-seeded Dstpexes. 



EUPHORBIA, L. Spusge. 



Floiuers monoecious, destitute of calyx and corolla, the 

 single pistillate, and several monandrous staminate ones 

 included in a cup-shaped or top-shaped 4-5-toothed invo- 

 lucre, which has commonly thick and often colored glands 

 between the teeth ; styles 3, 2-cleft ; capsule exserted, 3-cell- 

 ed ; carpels 2-valved, 1-seeded. — A polymorphous genus of 

 plants with acrid milky juice. 



§ Leaves without stipules. 



* Stem erect, umbellately branched above ; involucres solitary, terminal and in the forks 

 of the branches; leaves of the stem alternate, those of the branches opposite or 

 whorled. 



t Glands of the involucre 5, with white peiat-like appendages; leaves entire; perennials. 



E. COROLLATA, L. Stem smooth or pubescent ; tranches 

 4-6, twice or thrice forking, mostly short and f istigiate ; 

 leaves thick, oblong or oval, obtuse, pale and mostly liairy 

 beneath; involucres pediceled; appendages of the (green) 

 glands orbicular, showy; capsule and seed smooth. (E. 



