264 FLOKA OF TEXAS. 



C. viscosissiMA, Jacq. Annual, clammy-pubescent; 

 leaves thin, opposite, ovate-lanceolate, loug-petioled, rough ; 

 flowers nearly sessile, borne between the petioles, solitary; 

 petals violet-purple ; stamens 12. Stem 1° high. 



48. EVEXIXG-PRIMROSE FAMILY. Order, 

 Onagrace^. 



Cahjx adherent to the ovary, and often produced into a 

 tube beyond it, 2-6-lobed, valvate in the bud ; petals as 

 many as the lobes of the calyx, inserted into its throat, con- 

 volute in the bud, sometimes wanting; stamens 2iS many, 

 or twice as many, inserted with the petals; ovary 2-4- 

 celled; placenta central; style solitary; stigma capitate or 

 2-4-lobed; capsule loculicidally dehiscent or indehiscent; 

 seeds anatropous, with little or no albumen. — Chiefly herhs. 



Sub-order I. Onagraceae. Styles slender. Fruit 

 4-valved, indehiscent in Gaura, Seeds attached to a cen- 

 tral placenta, without albumen. 



* Calyx-tube produced beyond the ovary. 



Capsule not-like, indehisceDt, l^-seeded Gaitrjl, 



4-valved, maDy-seeded (Exotheka. 



** Calyx-tube not produced beyond the ovary. 



Stamens 8. Petals 4. Seeds comose EpiLOBiirsf. 



S-12. Petals 4-6. Capsule long. Seeds naked Jusslea. 



4. 4, or none. Capsule short, many-seeded Ln>wiGiA. 



2. obovate, 1-2-seeded Ctrc^a. 



Sub-order IL Halorageae. Styles very short or 

 none. Fruit indehiscent. Seeds suspended, solitary in 

 each cell. Albumen thin. Flowers minute, axillary. 



Flowers perfect. Stamens 3. Capsule 3-angled Prositrpixaca. 



Mionoecious. Stamens 4-8. Capsule 4-angled MnuopHTixTTSc. 



GAURA 

 Calyx-tnhe much produced beyond the ovary, the limb 



