GENTIANACE/E. (GENTIAN FAMILY.) 243 



* * Style short and persistent, or none : anthers remaining straight, 

 i- Corolla without nectariferous pits or large glands. 



2. Centiana. Calyx commonly with a membranous tube. Corolla funnelform, campanu- 



late, or salverfonn ; the sinuses with or without plaits or appendages. Stamens on 

 the tube of the corolla. Style very short or none. Seeds very numerous, not rarely 

 covering the inner wall of the ovary. 



3. Pleurogyne. Calyx deeply 4 to 5-parted. Corolla rotate, 4 to 5-parted ; the divisions 



acute, a pair of scale-like appendages on their base. Stamens on the base of the 

 corolla. Style none : stigmas decurrent down the sutures. Seeds extremely numer- 

 ous, near the two sutures. 



H- +- Corolla with one or two nectariferous pits, spots (glands), or an adiiate scale to each 

 lobe : calyx 4 to 5-parted. 



4. Swertia. Corolla rotate, 5- (rarely 4-) parted. Style none or very short. Capsule 



ovate. Leaves sometimes alternate. 



5. Frasera. Corolla rotate, 4-parted ; the lobes bearing a single or double fringed gland, 



and sometimes a fimbriate crown at base. Stamens on the very base of the corolla: 

 filaments often monadelphous at base. Capsule coriaceous, commonly flattened. 

 Leaves verticillate or opposite. 



1. ERYTHRJEA, Renealm. CENTAURY. 



Low herbs : the flowers usually small and with hroad stigmas. 



1. E. Douglasii, Gray. Slender, a span to a foot high, loosely and 

 pauiculately branched, usually sparsely flowered : leaves from oblong to linear, 

 mostly acute : flowers all on strict and slender peduncles or pedicels : lobes of 

 the pink corolla oblong, obtuse, at most 2 lines long, nearly half the length 

 of the tube. Bot. Calif, i. 480. Wyoming to Utah and westward to Cali- 

 fornia and Oregon. 



2. GENTIAN A, Tourn. GENTIAN. 



Herbs, with conspicuous flowers of various colors, in summer or autumn. 

 Herbage and roots very bitter. 



1 . Corolla destitute of extended plaits or lobes or teeth at the sinuses. GEN- 



TIANELLA. 



* Flowers large or middle-sized, solitary, mosf.li/ 4-merous : corolla companulate- 

 fiinnelform, its lobes usually fimbriate or erose, not crowned: a row of glands 

 between the bases of the filaments. (FRINGED GENTIANS.) 



i- flower on a naked and usually long peduncle terminating the stem or branches, 

 not bracteate at base : filaments naked : calyx with acutely carinate lobes, the 

 tube sharply angled by the decurrent keels. 



1. G. crinita, Frcel. A foot or two high, often paniculate-corymbose, 

 leafy : leaves lanceolate or ovate-lanceolate from a rounded or subcordate partly 

 clasping base : corolla 2 inches long, sky-blue, rarely white ; its lobes cuneate- 

 obovate, strongly fimbriate around the summit, less so down the narrowing sides: 

 capsule conspicuously stipitate. Head-waters of the Missouri to Canada, 

 thence southward to Georgia. 



2. G. serrata, Gunner. Stern 3 to 18 inches high : leaves linear or lance- 

 olate-linear : corolla 1 to l inches long, sky-blue or rarely white; its lobes 

 oblong or spatulate-obovate, eroscly fimbriate or toothed around the summit and 

 sides, or sometimes either part nearly bare : capsule short-stipitate. G. detonsa, 



