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. distegia 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 unequal, mostly 

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

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

 or even wanting. G. Amarella 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 internodes often much 

 longer than the leaves: 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. 

 Amarella acuta. (A marella scopulorum Greene, Leaflets 1 : 55. 1904; Gentia- 

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

 range. 



6a. Gentiana plebeja Holmii 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 cauline 2-4 pairs, connate- 

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

 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 equaling 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 solitary 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 internodes: flowers yellow or yellowish- white with numerous green 

 dots. Teton Mountains, Wyoming. 



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

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

 varying to oblong-lanceolate, 18-36 mm. long, most of the pairs with some- 

 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 corolla 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. 



9a. Gentiana Parryi bracteosa (Greene) A. Nels. Leaves narrower, the 

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

 base of the membranous summit of the tube. (G. bracteosa Greene, Pitt. 

 4: 180. 1900.) Colorado. 



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



