KEY TO THE SPECIES 61 



1. GENTIANA (Gentian) 



Herbs with nearly sessile leaves, tubular 4-5-cleft calyx, 4-5-lobed showy 

 corolla and sessile or short-styled stigma cleft into 2 lamellse. 



» Corolla without teeth or folds in the sinuses, the lobes fringed. 



1. Gentiana elegans Aven Nelson. (Rocky Mountain Frinred Gentian). 

 Annual : stems 1 or more, 1.5-3 dm. high, simple, terminated by a single large pe- 

 duncled flower ; leaves 3-6 pair, obovate to spatulate : calyx-lobes nearly equal, as 

 long as the tube ; corolla deep blue with lighter streaks downward, 4-5 cm. long, 

 its lobes toothed at the summit, fringed on the sides. (State flower of Wyoming.) 



* * Corolla with teeth or folds in the sinuses, the lobes not fringed. 



2. Gentiana Parryi Engelm. (Parry's Gentian). Stems several ; leaves 

 ovate to oblong, thick, sessiie, 8-12 pairs, the uppermost 2 or 3 pairs somewhat 

 enlarged and subtending the 1-5 large bell-shaped dark-blue corollas like an 

 involucre ; lobes of the calyx short-linear ; the appendages in the sinuses deeply 

 2-cleft. Frequent in sub-alpine parks. 



3. Gentiana affinis Griseb. (Oblong-leaved Gentian). The several or 

 numerous stems clustered, ascending, 3-4 dm. long ; leaves mostly oblong, 7-14 

 pairs ; flowers many (and thyrsoid-racemose) to few, 2-3 cm. long ; calyx-lobes 

 linear, very unequal ; corolla dark blue, with acute lobes, narrowly funnel-form. 

 Frequent in meadows and valleys at middle elevations, 



3. FRASERA (Columbo) 



Biennials from large woody roots, with stout, tall, column-like very leafy stems, 

 rotate 4-parted corolla having conspicuous fringed glands on the base of each lobe, 

 and a coriaceous flattened capsule. 



1. Frasera speciosa Dougl. (CoNSPionons Columbo). Leaves in first year 

 plants rosulate on the crown ; the second year in whorls of 4-6 on the 7-15 Asa, 

 high, simple stems, spatulate or oblong 2-3 dm. long, passing into the lanceolate 

 foliar bracts of the crowded spicate thyrsus ; flowers greenish-white with dark 

 dots. Widely distributed on open hills and in open woods in the mountains. 



LII. APOCYNACEiE (Dogbane Family) 



Herbs or woody plants with opposite entire leaves, regular 

 sympetalous flowers with parts in 5's, 2 distinct ovaries or a 2- 

 celled ovary, and fruit a pod. 



1. APOCYNUM (Dogbane) 



Herbs with upright branching stems, small and pale flowers in flattish clusters, 

 bell-shaped 5-clef t corolla, stamens on base of corolla and with anthers converging 

 about the stigma, and 2 distinct ovaries united at tip by the stigma and becoming 

 2 long slender pods containing seeds, with a tuft of long silky hairs at the apex. 

 (See Plant Structures, p. 272, Fig. 257.) 



1. Apocynum androssemlfolium L. (Spreading Dogbane). Branches fork- 

 ing and spreading ; leaves ovate, distinctly petioled ; flower-clusters loose and 

 spreading ; corolla pale rose-color, open bell-shaped, with revolute lobes, the tube 

 much longer than the divisions of the calyx. Borders of thickets. 



