SCKOPHULARIACE^. (FIGWORT FAMILY.) 271 



1. N. attenuata, Torr. A foot or two high: leaves all on naked and 

 mostlji slender petioles and acute or merely obtuse at base ; the lower ovate or 

 obloug; the upper from oblong-lanceolate and atteimateacumiuaie to linear- 

 lanceolate or liuear: corolla dull white or greenish, slender sulvcrform, not en- 

 Icuyed at the tliroat ; the tube 1 /y 1| inches low/ ; the ohscurelj b-luhed limb A to ^ 

 lines in diameter : filaments equallij inserted low doa-n on the tube. — In diy 

 ground, from Colorado to Nevada and California. 



2. N. quadrivalvis, Pursh. A foot high, rather stout: leaves oblong 

 or the uppermost lanceolate, and the lower ovate-lanceolate, acute at both 

 ends, mostlt/ sessile: flowers few: corolla white, tubular-fannelform and ojten- 

 mouthed ; the tube barelq an inch lonrj ; the 5-lobed limb 1^ inches or more in diame- 

 ter: filaments unequallj inserted in the upper part of the tube: capsule 4-celled. — 

 A native of Oregon, but cultivated by the Indiaus to the Missouri : their most 

 prized tobacco-plant. 



Order 56. SCROPHULARIACEiE, (Figwort FA>nLY.) 



Chiefly herbs with didynamous or diandrous stamens inserted on tlie 

 tuhe of the 2-lippcd or more or less irregular corolla: fruit a 2-cclU'd 

 and usually many-seeded pod. Style single: stigma entire or 2-Iube(i. 



1. Leaves prevailingly opposite, at least the lower: upper lips or lobes of the corolla ex- 



ternal in the bud. — Antirrhinide^.. 



* Corolla bilabiate and more or less tubular ; the base of the tube gibbous or spurred on the 



lower side, and the lower lip often with an intrusion (palate) at the tliroat: stamens 

 4, with 2-celled anthers : cai)sule opening by Irregular perforations or oliinks : inflo- 

 resrence simple and raceniose. 

 1 Linaria. Corolla with a spur at base and a prominent palate nearly closing the throat 



* * Corolla more or h ss bilabiate and tubular, not saccate or otherwise produced ai itase 



anteriorly : stamens 4, with usually a rudiment of the fiftli present : capsule dehiscent 

 by valves : inflorescence normally compound, 

 ■t- Corolla gibbous or saccate on the upper or posterior side of the tube* ovules and sewls 

 few or solitary in the cells : calyx deeply 5-cleft: flowers solitary or umbelliform-verti- 

 cillate. 



2. Collinsia. Corolla deeply bilabiate ; its upper lip 2-cleft, with lobes more or less erect ; 



lower larger and 3-lobed ; its lateral lobes pendulous-spreading; middle one condu- 

 plicate into a keel-shaped sac which encloses the 4 declined stamens and style. Ante- 

 rior pair of filaments inserted higher than the other: anther-cells confluent nt the 

 apex. A gland at base of corolla represents the fifth stamen. Leaves undivided. 

 ■>- -t- Corolln-tube not gibbous posteriorly: ovules and seeds indefinitely numerous : calyx 

 deeply 5-parted or of distinct sepals: inflorescence mostly tliyrsoiilal. 



3. Scrophularia. Corolla short : the tube ventricose and globular or oblus^j: loWs 5. 



uiie(iual, 4 erect and the fifth reflexed or spreading. Sterile stnnicn represented l»y a 

 scale on the upper side of the ccuolla : anthers transverse and confliiently Icelleil. 



4 Pentstemon. Corolla from ventricose campanulate to elongated-tubular : the limb 

 either obscurely or strongly bilabiate. Sterile stamen re|iresented liy a conspicuoup 

 and elongated filament : anther-cells either united or confluent at n|)cx. 



H- 4- .^ Corolla-tube not gibbous: ovules and seeds rather numerous; calyx not <leeplT 

 cleft : inflorescence simply spicnte. 



5. Chionophlla. Calyx funnelform. Corolla tubular, with slightly dihfed throat «n«l 

 bilabiate limb ; upper lip erect, barely 2-lobed, the sides somewliat recurved ; lower 



