760 SOLAN ACEAE 



2. N. attenuata Torr. Annual; stem 3-6 dm. viscid-puberulent; leaves 

 petioled; blades ovate to lanceolate, long-acuminate, 5-10 cm. long; inflorescence 

 paniculate; calyx-teeth triangular-lanceolate; corolla dull white or greenish, gla- 

 brous, 2-2.5 cm. long. A^ Torrcyana Nels. & Macbr. Dry or sandy ground: 

 Mont.— N.M.— Calif.— B.C.; Mex. Son.—Submont. Je-S. 



3. N. quadrivalvis Pursh. Annual; stem 3-6 dm. high, viscid-pubescent, 

 branched; lower leaves petioled, the upper sessile; blades ovate-lanceolate, 

 lanceolate, or oblong, acute at both ends, viscid-pubescent; flowers few; corolla 

 about 2 cm. long, funnelform. Valleys and cultivated ground: Wash. — -Mont.— 

 Ore. 



Family 117. SCROPHULARIACEAE. Figwort Family. 



Annual or perennial herbs, rarely shrubs or trees, with mostly round 

 stems. Leaves usually opposite, sometimes whorled, or alternate, without 

 stipules. Flowers perfect, more or less irregular. Calyx of 5 or 4, more or 

 less imbricate and united sepals. Corolla usually 2-lipped, sometimes 

 almost regular. Stamens usually 4, rarely 5, or only 2 fertile, one pair 

 longer than the rest, the fifth stamen sometimes represented by a sterile 

 filament, all partly adnate to the tube of the corolla. Gynoecium of 2 

 united carpels; ovary 2-celled; styles usually united, rarely distinct. Fruit 

 a 2-celled, 2-valved capsule, rarely baccate. Seeds numerous; endosperm 

 present, surrounding the embryo, fleshy or cartilaginous. [Rhixanthaceae.] 



Anther-bearing stamens 5. 



Corolla rotate. 1. Verbascum. 



Corolla funnelform, 2-lipped. (Occasional forms of) 7. Pentstemon. 



Anther-bearing stamens 4 or 2. 



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



Corolla cUstinctly spurred at the base. 2. Lixaria. 



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



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 gibbou.s at the base on the upper side; ovules and seeds few or 

 soUtary; annuals. 

 Corolla deeply bilabiate, the middle lobe of the lower lip condupUcate 



and enclosing the stamens. 4. Collinsi.a.. 



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

 not enclosing the stamens. 5. Tonella. 



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

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

 ' erect, the lower spreading; perennials. 6. Scrophularlv. 



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

 or fvinnelform. 

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

 ticulate outer coat; corolla not gibbous at the base above; calyx deeply 

 cleft. 7. Pextstemo.v. 



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

 ticulate outer coat. 

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

 escence racemose. 8. Pentstemonopsis. 

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

 obtiisely 5-lobed; inflorescence spicate. 9. Chionophila. 

 Stamens 4 or 2. 



Upper Up or lobes external in the bud. 

 Anther-bear iUg stamens 4. 



Corolla more or less bilabiate; sepals united 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. MlMULUS. 

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

 ating and remaining attached to the valves. 



11. Eunanus. 

 Corolla nearly regular. 



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



plant caulescent. 12. Moxiera. 



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

 from the basal rosette of leaves; plant acaulescent. 



13. Limosella. 



