666 GENTIANACEAE 



6. L. coeruleum (Mulford) Rydb. Stems erect, 1.5-4 dm. high, glabrous; 

 basal leaves linear-oblanceolate, glabrous, 1-1.5 dm. long; stem-leaves narrowly 

 linear, opposite, 4-8 cm. long; floral ones bract-like; sepals lanceolate, white- 

 margined, about 6 mm. long; corolla blue; lobes ovate, acute, 6-8 mm. long; 

 gland linear, green, extending from the base to near the middle of the corolla- 

 lobes, fringed on the margin. F. coerulea Mulford. Mountains: Ida. Ore. 

 Submont. Mont. 



11. TESSARANTHIUM Kellogg. DEER'S TONGUE. 



Stout perennials with taproots. Leaves in whorls of 4, entire, strongly 

 parallel-veined, rather firm. Flowers perfect, in an elongate many-flowered 

 thyrsus. Sepals nearly distinct, narrowly linear, at least equalling the corolla. 

 Corolla rotate, deeply 4-cleft; each division with a pair of oblong glands, and a 

 separate crown below them, dull white or greenish white, dark spotted. Sta- 

 mens inserted on the base of the corolla; filaments subulate. Capsule compressed 

 contrary to the deeply boat-shaped valves. Seed oblong, flat, margined. 



Corolla-lobes 18-22 mm. long, usually exceeded by the long sepals. 



Plant glabrous; inflorescence simple with verticillate pedicels; basal leaves over 1 dm. 



wide. 1. T. macrophyllum. 



Plant puberulent; inflorescence compound; some branches simple, others again 



branched; basal leaves about 5 cm. wide. 2. T. scabrum. 



Corolla-lobes about 15 mm. long or less; inflorescence compound. 



Sepals narrowly linear, usually much exceeding the petals. 3. T. stenosepalum. 



Sepals linear-lanceolate or subulate, scarcely equalling the petals. 



Stem-leaves oblanceolate. 4. T. speciosum. 



Stem-leaves linear-lanceolate. 5. T. angusti folium. 



1. T. macrophyllum (Greene) Rydb. Stem 1-2 m. high, very leafy; 

 basal leaves oblanceolate, 3-5 dm. long, 6-13 cm. wide, rather thin, glabrous, 

 9-15-ribbed; stem-leaves lanceolate, verticillate; pedicels of various length, 

 3-15 cm. long, usually simple; sepals linear-subulate, 2-3.5 cm. long; corolla- 

 lobes obovate, 18-22 mm. long; fringes of the crown long, almost equalling the 

 narrowly oblong glands. Frasera macrophylla Greene. Rich hillsides: Wyo. 

 N.M. Submont. Mont. Jl-Au. 



2. T. scabrum (M. E. Jones) Rydb. Stem 1 m. or less high, leafy; basal 

 leaves 1-3 dm. long, 3.5-6 cm. wide, oblanceolate, acute, with 7-9 strong ribs, 

 scabrous-puberulent ; stem-leaves linear-lanceolate; peduncles axillary, some 

 simple, one-flowered, others branched and 2-5-flowered; sepals linear-subulate, 

 12-30 mm. long; corolla-lobes 18-20 mm. long, oblong-obovate, obtuse; fringes of 

 the crown equalling the oblanceolate glands. F. speciosa scabra M. E. Jones. 

 Hills and mesas: Ariz. Utah Colo. N.M. Submont. Mont. Je-Jl. 



3. T. stenosepalum Rydb. Stem 1 m. high or less; basal leaves oblance- 

 olate, 1.5-3 dm. long, 3-5 cm. wide, scabrous-puberulent, thick, 11-13-ribbed, 

 very acute; stem-leaves lanceolate; flowers numerous, on axillary, simple or rarely 

 branched peduncles; sepals 1-2 cm. long; corolla-lobes elliptic, about 15 mm. long, 

 acute; fringes of the crown equalling the oblong glands. F. speciosa stenosepala 

 Rydb. Foot-hills and mountain-sides : Wyo. N.M. Submont. Mont. Je-Au. 



4. T. speciosum (Dougl.) Rydb. Stem 3-15 dm. high; basal leaves ob- 

 lanceolate, acute, 1-3 dm. long, 3-5 cm. wide, more or less scabrous-puberulent; 

 sepals 10-15 mm. long; corolla-lobes oval, acutish, 12-15 mm. long; fringes of 

 the crown usually shorter than the oblong glands. F. speciosa Dougl. Hills 

 and mountains: Ore. Calif. Colo. S.D. Mont. Plain Mont. Je-Au. 



5. T. angustifolium Rydb. Stem 3-6 dm. high, puberulent; basal leaves 

 mostly reduced and scale-like or a few linear or linear-lanceolate, 5-8 cm. long, 

 0.5-1.5 cm. wide; peduncles usually simple and 1-flowered; sepals linear-subulate, 

 8-10 mm. long; corolla-lobes about 12 mm. long, oval, acute; fringes of the crown 

 scarcely equalling the oblong glands. F. speciosa angustifolia Rydb. Hills: 

 Mont. Colo. Submont. Mont. 



12. TETRAGONANTHUS J. F. Gmel. SPURRED GENTIAN. 



Annual or perennial caulescent herbs. Leaves opposite, entire. Flowers 

 perfect, in terminal or axillary cymes or panicles. Calyx deeply 4-cleft. Cor- 



