110 SELECTED WESTERN FLORA 



3. G. ploplnqua, Richards. 



Stem slender, branched; leaves spatulate below, lanceolate above, 

 calyx 4-cleft, 2 lobes linear and 2 oblong; , corolla 4-cleft, blue. Hillsides 

 and Alpine swamps, Hudson Bay to Rocky Mts. 



tt Corolla small, white or yellowish. 



4. G. Amarella, L., var. aciita, (Michx.) Herder. 



Erect, 6-18 in. high; upper leaves lanceolate, but the very lowest often 

 obovate or spatulate; flowers small, clustered in the axils of the upper 

 leaves. ((?. plebeja, Cham.) Moist grassy places, Man.-Alta; 



** With folds or plaits between the lobes or the corolla. 

 t Corolla open. 



5. G. affinis, Griseb. 



Stems clustered, 6-12 in. high, very leafy; leaves oblong to linear; flowers 

 blue, numerous, in raceme-like clusters; the plaits between the corolla lobes 

 with projections sometimes equalling the lobes. Damp soil in late summer, 

 ' Man.-Alta. 



tt Corolla plosed. 



6. G. Andrewsii, Griseb. Closed Gentian. 



Stem upright or ascending; leaves ovate-lanceolate ; corolla closed at the 

 mouth, the lobes equalled by the projections of the plaits, blue with whitish 

 folds. Damp soil, Man. 



LXVIII. APOCYNACE.ffi (Dogbane Family). 



Perennial herbs with a bitter milky juice, opposite entire leaves 

 and regular flowers; calyx 5-parted, free from the ovary; corolla 

 5-parted, twisted in the bud; stamens distinct, on the corolla; seeds 

 often having a tuft of down. 



1. APOCYNUM. Dogbane. 



Calyx teeth sharp; corolla bell-shaped with an appendage on the 

 tube at the base of each lobe; stamens 5, on the base of the corolla, 

 filaments shorter than the anthers, anthers adhering to the stigma; 

 flowers pink or white in cymose clusters. 



1. A. androssemifolium, L. Spreading Dogbane. 



Stem smooth, erect, branching, 1^2 ft. high; leaves ovate to oblong, 

 spreading on slender petioles, usually pale and somewhat pubescent beneath ; 

 flowers pink, nodding, in cymes with the central flower the largest, and all the 

 cymes opening at the same time. Dry thickets, Man.-Alt^. 



