382 GENTIANACEAE (GENTIAN FAMILY) 



sepals; these more or less . enfolding the three small linear-lanceolate ^ones; 

 corolla blue or purplish, the tube equaling the calyx, a crown of setaceous fila- 

 ments at the base of its lobes. (G. aistegia Greene, Pitt. 4 : 182. 1900.) — Rare; 

 mountains of Colorado, Utah, and Wyoming. 



5. Gentiana strictiflora (Rydb.) A. Nels. Bot. Gaz. 34: 26. 1902. Stem 

 simple or branched, very strict, 1-4 dm. high; leaves often rather remote, 

 thickish, mostly lanceolate-linear, light green: flowers numerous, spicate- 

 thyrsiform on stem and branches, 4-merous: calyx-lobes, unegual, mostly 

 shorter than the tube: corolla ochroleucous, sometimes tinged with blue, but 

 little longer than the caljrx, 8-12 mm. long; the setae of the crown often few 

 or even wanting. 0. Amarelia stricta. — Frequent; throughout our range. 



6. Gentiana plebeja Cham. Linnaea 1 : 181. 1826. Stem simple or branched 

 from the base, slightly angular, 1-3 dm. high, the intemodes often much 

 longer than the leayes: basal leaves oval-spatulate; middle stem leaves .oblong 

 or oblong-lanceolate, obtuse, 2-4 cm. long; the uppermost oblong-linear, 

 acute: flowers several in each axil, often on a short branch, more numerous 

 at summit; calyx deeply cleft, its longer linear lobes almost equaling the 

 corolla tube: corolla 12-18 mm. long, pale blue, the lobes fringed at base. G. 

 Amarelia aciUa. (Amarelia scopidorum Greene, T-ieaAets 1: 55. 1904: feeniio- 

 nella dementis Rydb. Bull. Torr. Bot. Club 31: 631. 1904.)— Throughout our 

 range. i 



6a. Gentiana plebeja Hohnii Wettst. Oester. Bot. Zeitsch. 50: 195. 1900. 

 Slender and low, simple or nearly so, few-flowered. — ^A reduced alpine state 

 of the species. ,. 



7. Gentiana Romanzovii Ledeb. Nouv. Mem. Soc. Nat. MosC. 1: 215. 

 1829. Stems 5-15 cm. high, often tufted, each 1-3-flowered: leaves linear) 

 varying to lanceolate or spatulate, thickish; the caiiline 2-4 pairs, connate- 

 sheathing at base: calyx-tube obconical, the lobes somewhat unequal, abbUt 

 half as long as the corolla: corolla funnelform, 3-4 cm. long, yellowish, often 

 streaked with blue, liberally spattered with purplish dots; the lobes short 

 and broad, the plaits entire and broad, only slightly extended at summit: 

 seeds with a loose cellular coat having crested longitudinal ridges. G.frigida. 

 — ^Alpine regions in the Rocky Mountains. 



8. Gentiana calycosa Griseb. Gent. 292. 1839. Stems erect, 1-3 dm. high: 

 leaves ovate, 15-30 mm. long, commonly equaUng or exceeding the inter- 

 nodes, the lowest pairs smaller and with connate-sheathing base, the upper 

 hardly so; the uppermost involucrate and somewhat exceeding the calyx of 

 the commonly sohta,ry flower: lobes of the calyx ovate or oblong, or even sUb- 

 cordate, about as long as the turbinate tube: corolla blue, oblong-funnelform, 

 the appendages in the sinuses triangular-subulate, laciniate or 2-cleft at tip, 

 shorter than the broadly ovate lobes: seeds lanceolate, acuminate, wingless. — 

 On the highest mountains; western Wyoming to California and Oregon. . 



8a. Gentiana calycosa xantha A. Nels. 1. c. Leaves about 5 pairs, longer 

 than the intemodes: flowers yellow or yellowish-white with numerous greeti 

 dots. — ^Teton Mountains, Wyoming. h' 



9. Gentiana Parryi Engelm. 1. c. 218. Stems nimierous from the crown of 

 a somewhat woody root, 1-3 dm. high: leaves glaucescent, thickigh, ovate, 

 varying to oblong-lanceolate, 18-36 mm. long, most of the pairs Witt sorSe- 

 what sheathing base; the upper two or three pairs involucrate around the 

 1-5 flowers, concealing the calyx and, sometimes almost equaling the bright 

 blue corolla: lobes of the calyx small, moderately or much shorter than the 

 campanulate tube: appendages in the sinuses of the coroUa narrow, deeply 

 2-cleft, but little shorter than the obovate lobes: seeds lanceolate, wingless, 

 with obtuse or acutish edge. — Alpine and subalpine in the Cascade and 

 Rocky Mountains. , 



'ia. Gentiana Parryi bracteosa (Greene) A. Nels. Leaves narrower, the 

 floral ones thin and somewhat soarious: calyx-lobes small and inserted at the 

 base of the membranous summit of the tute. (G. hracteosa Greeiie, Pitt. 

 4: 180. 1900.)— Colorado. ; " 



10. Gentiana affinis , Griseb. J. c. 289. Stems clustered, 1,-3 dm, high: 



