74 GENTIANACEiE. (GENTIAN FAMILY.) 



over the truncate summit of the stigma, their wing-like edges meeting and projecting 

 between the hoods; pollen in 10 wax-like masses. Follicles ovate or lanceolate. Seeds 

 numerous, flat, downwardly imbricated all over the large, soon detached placenta; the 

 upper end with a long tuft of down (coma). — Hoods in our species erect and not exceed- 

 ing the stamens and stigma. 



1. A. fascicularis, Decaisne. Smooth, slender, 1 to 5 ft. high; leaves in whorls of 

 3 to 5, or some in pairs, linear and linear-lanceolate; flowers white or whitish; horns 

 longer than the hoods. 



2. A. vestita, Hook & Arn. White-wooUy; leaves opposite, ovate-lanceolate or 

 oblong-lanceolate, almost sessile; umbels almost sessile; flowers about half an inch long, 

 the hoods flesh-colored. 



2. GOMPHOCARPUS, E, Br. 



No horn to the hood of the stamens; otherwise as Asclepiaa. 



§ 1. Hoods saccate, pointless, lower than the anthers, opening down the back, as if 2'Valved, 



1. G. tomentosus, Gr. White-tomentose, closely resembling Asclepiaa vistitia; 

 stem acutely angled; leaves ovate or oblong (about 4 inches long); corolla greenish-white 

 or purplish. 



2. G. purpurascens, Gr. Canescently puberulent; stems 4 to 12 inches high; 

 leaves ovate and somewhat cordate, an inch or two long; flowers small; the corolla red- 

 purple; the hoods white. 



§ 2. Hoods erect, open down thefroni, somewhat surpassing the anthers. 



3. G. cordifolius, Benth. Green and smooth, 2 or 3 ft. high; leaves ovate or ovate- 

 lanceolate, with cordate clasping base, opposite, rarely in threes, 2 to 5 inches long; 

 flowers large; corolla dark red-purple; the hoods purplish. 



Order 37. GENTIANACEiE. 



Glabrous herbs, with colorless, bitter juice, entire opposite and sessile leaves, no sti- 

 pules, perfect and regular flowers, stamens as many as the lobes of the corolla and alternate 

 with them, inserted on the tube, the anthers free from the stigma; ovary 1 -celled; style 

 one or none; the stigmas commonly two. Calyx persistent. 



§ 1. Corolla withering-persistent. Leaves opposite or whorled, entire, sessile. 



Corolla salver-form, red; calyx 5-parted Erythraea. 1 



Corolla short, salver- form, yellow; caylx 4-toothed Microcala. 2 



Corolla funnel-form, blue Gentiana, 3 



§ 2. Corolla deciduous. Leaves alternate, with sheathing petioles. 

 Flowers borne on a naked scape Menyanthes, 4 



