304 SOLANACEAE. 



9. NICOTIANA L. Tobacco. 



Leaves clasping at the base; flowers diurnal. i. N. Irigonophylla, 



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



1. Nicotiana trigonophylla Dunal. In dry grounds from Colo, and Utah 

 to Tex. and Calif.; also in Mex. — "Southern Colorado" {Parry). 



2. Nicotiana attenuata Torr. In dry or sandy ground from Mont, and 

 B. C. to N. M. and Calif. — Alt. 6000-7000 ft. — Gypsum, Eagle Co.; Black 

 Cafion ; Salida ; Glenwood Springs, Garfield Co. ; Montrose ; McElmo Canon ; 

 Hotchkiss ; Rustic ; mountains between Sunshine and Ward. 



Family 120. RHINANTHACEAE St. Hil. Figwort Family. 



Anther-bearing stamens 5. 



Corolla rotate. i. Verbascum. 



Corolla funnelform, 2-lipped. (Occasional forms of) 5. Pentstemon. 



Anther-bearing stamens 4 or 2. 



Corolla spurred or saccate at the base on the lower side. 2. Linaria. 



Corolla neither spurred nor saccate 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 



solitary; annuals. 3. Collinsia. 



Corolla not gibbous at the base, but more or less ventricose especially 

 on the lower side ; ovules and seeds numerous ; perennials. 



4. Scrophularia. 

 Sterile stamen elongated, filiform to spatulate ; corolla-tube elongated, 

 tubular or funnelform. 

 Inflorescence thyrsoid-paniculate ; seeds not with an ariliform, cellular- 

 reticulate outer coat ; corolla not gibbous at the base above ; calyx 

 deeply cleft. 5. Pentstemon. 



Inflorescence racemose or spiciform ; seeds with an ariliform, cellular- 

 reticulate outer coat, calyx obtusely 5-Iobed. 6. Chionophila. 

 Stamens 4 or 2. 



Upper lip or lobes of the corolla external in the bud. 

 Anther-bearing stamens 4. 



Corolla more or less bilabiate ; sepals united into an angled tube ; 



plants leafy-stemmed. 7. Mimulus. 



Corolla nearly regular ; flowers solitary on scape-like peduncles from 

 the basal rosette of leaves; plant acaulescent. 8. Limosella. 

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

 filaments short or wanting. 9. Gratiola. 



Lower lip or lobes of the corolla external in the bud. 

 Stamens 2. 



Corolla almost regularly 4-lobed. 10. Veronica. 



Corolla none or 2-lipped, cleft to near the base ; upper lip entire ; 

 lower irregularly cleft or toothed. 11. Besseya. 



Stamens 4. 



Corolla slightly 2-lipped ; stamens not ascending under the upper lip. 



12. Gerardia. 

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

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

 mostly alternate. 

 Calyx gamosepalous, i. e., all the sepals united below into a tube. 

 Calyx deeply cleft in front and behind, less deeply so (some- 

 times not at all) on the sides ; upper lip of the corolla much 

 longer than the 3-lobed lower one. 13. Castilleja. 



