206 SOLANACEAE 



Corolla ATiolet; prickles all alike. 3. D. Talula. 



Capsule aoddiiig; plant more or less cinereous. 4. D. discolor. 



10. NICOTIANA (Tourn.) L. Tobacco. 



Corolla salverform; capsule 2-celled. 



Leaves clasping at the base; flowers diurnal. 1. N. trigonophylla. 



Leaves petioled, not clasping at the base; flowers nocturnal. 2. N. atlenuata. 



Corolla fiumelform; capsule 4-celled; leaves acute at both ends. 3. N. quadrivalvis. 



F.VMiLY 117. SCROPHULARIACEAE. Figwort Family. 



.\nther-bearing stamens 5. 



Corolla rotate. 1. Verbascum. 



Corolla fimnelform, 2-lipped. (Occasional forms of) 7. Pextstemon. 



Anther-bearing stamens 4 or 2. 



Corolla spurred, saccate or gibbous at the base on the lower side. 



Corolla distinctly spurred at the ba.se. 2. LIXARIA. 



Corolla merely saccate or gibbous at the base. 3. Antirrhinum. 



Corolla neither spurred, nor saccate, nor gibbous on the lower side. 



Stamens 5, 4 anther-bearing; the fifth sterile and often rudimentary. 



Sterile stamen rudimentary, represented by a scale or gland on the upper 

 inside of the corolla-tube or throat; corolla short. 

 Corolla gibbous at the base on the upper side; ovules and seeds few or 

 soUtary; annuals. 

 Corolla deeply bilabiate, the middle lobe of the lower Up conduplicate 



and enclosing the stamens. 4. Collinsia. 



Corolla obscurely bilabiate, its five lobes rotately spreading, the lowest 

 not enclosing the stamens. 5. Toxella. 



Corolla not gibbous at the base, but more or less ventricose especiallj- on 

 the lower side; ovTiles and seeds numerous; 4 upper lobes of tlie corolla 

 erect, the lower spreading; perennials. 8. Scrophul.\RI.\. 



Sterile stamen elongate, flUform to spatulate; corolla-tube elongate, tubular 

 or fiumelform. 

 Inflorescence thjTsoid-paniculate; seeds not with an arihform cellular-re- 

 ticulate outer coat; corolla not gibbous at the base above; caly.x deeply 

 cleft. 7. Pextstemox. 



Inflorescence racemose or spiciform; seeds with an arUiform cellular-re- 

 ticulate outer coat. 

 Corolla gibbous at the base above; calyx divided to near the base; inflor- 

 escence racemose. 8. Pextste.moxopsis. 

 Corolla not gibbous at the base above; calyx deeply tubular-fumielform, 

 obtuselj' 5-lobed; inflorescence spicate. 9. Chioxophila. 

 Stamens 4 or 2. 



Upper hp or lobes external m the bud. 

 Anther-bearing stamens 4. 



Corolla more or less bilabiate; sepals imited into an- angled tube; plants 

 leafy-stemmed. 

 Style glabrous; stigma divided into 2 oval lobes; placentae remain- 

 ing united in the middle, rarely separating. 10. MniULUS. 

 Style glandular above; stigma peltate-fimnelform ; placentae separ- 

 ating and remaining attached to the valves. 11. EUXAXU.S. 

 Corolla nearly regular. 



Calyx unequally 5-parted; flowers soUtary in the axils of the leaves; 



plant caulescent. 12. Moxiera. 



Calyx regularly 5-lobed; flowers solitary on scape-like peduncles 

 from the basal rosette of leaves; plant acaulescent. 



13. Limosell.\. 

 Anther-bearing stamens 2; calyx of 5 almost distinct sepals; sterile fila- 

 ments short or wantmg. 14. Gratiol.v. 

 Upper Up or lobes internal in the bud. 

 Stamens 2. 



Corolla almost regularly 4-lobed. 



Corolla rotate; leaves opposite or verticUlate. 



15. Veroxica. 

 CoroUa campanulate or short-tubular; leaves alternate, mostly 

 basal. 16. Synthyris. 



Corolla none, or 2-Upped, cleft to near the base; upper Up entire, the 

 lower irregularly cleft or toothed; basal leaves ample; stem-leaves 

 bract-hke, reduced and alternate. 17. Besseya. 



Stamens 4. 



Corolla sUghtly 2-lipped; stamens not ascending under the upper Up. 



IS. Agalixis. 

 Corolla distinctly 2-lipped; stamens ascending under the upper Ud. 

 Anther-sacs dissinular, the inner one pendulous by its apex; leaves 

 mostly alternate. 

 Calyx gamosepalous. 



Calyx deeply cleft in front and beliind, less deeply so on the 



sides; upper lip of the corolla much longer than the 



3-lobed lower one. 19. Castilleja 



Calvx almost equaUy 4-cleft; upper Up of the corolla slightly 



if at all longer than the 1-3-saccate lower one, which 



is minutely or obsoletely toothed. 



