GENTIAN FAMILY 665 



Sepals 4, nearly distinct, narrow. Corolla rotate, deeply 4-cleft; lobes convolute 

 in bud, each with a single round gland, without a crown. Stamens 4, inserted 

 at the base of the corolla; filaments subulate; anthers versatile. Ovary 1 -celled; 

 stigma 2-lobed. Capsule flattened parallelly to the valves. Seeds orbicular, 

 wing-margined . 



1. F. fastigiata (Pursh) Heller. Stem 6-10 dm. high, glabrous; basal 

 leaves 2-4 dm. long, glabrous, oblanceolate to broadly spatulate, obtuse or acute, 

 5-8 cm. wide, thin, feather-veined; stem-leaves verticillate, usually in 3 's, oblong 

 or lanceolate, sessile, acute; inflorescence an interrupted, much compound pan- 

 icle or thyrsus; corolla pale blue; lobes lance-oblong or elliptic, acute, thin. Hill- 

 sides and open woods: Ida. Wash. Ore. Submont. My-Jl. 



10. LEUCOCRASPEDUM Rydb. 



Perennials with taproots. Leaves opposite or whorled, narrow, firm, with 

 white margins. Flowers perfect, thyrsoid or paniculate. Sepals 4, almost 

 distinct, persistent. Corolla rotate* deeply 4-parted, marcescent; lobes each 

 with a single gland usually contiguous with a decurrent crown, saccate at the 

 base. Stamens inserted on the base of the corolla; filaments subulate to ovate. 

 Style slender; ovary 1-celled. Capsule usually flattened parallelly to the flat- 

 tish valves. Seeds mostly flat and margined. 



Scales between the stamens wanting (represented by merely hairs) ; corolla greenish yellow. 

 Basal leaves oblanceolate; lower stem-leaves linear. 1. L. albomarginatum. 



Basal leaves lanceolate; lower stem-leaves long-acuminate from an ovate base. 



2. L. utahense. 

 Scales between the stamens present, fringed or cleft. 



Flowers creamy white; plant glabrous. 3. L. montanum. 



Flowers blue. 



Plant puberulent; inflorescence dense; interstaminal scales lanceolate. 



4. L. albicaule. 

 Plant glabrous; inflorescence more open; interstaminal scales obovate or orbicular. 



5. L. coeruleum. 



1. L. albomarginatum (S. Wats.) Rydb. Stem 3-10 dm. high, glabrous; 

 basal leaves about 1 dm. long, glabrous; stem-leaves linear or the. floral ones 

 reduced to subulate bracts, verticillate in 3's or 4's, rarely opposite; inflorescence 

 open, often flat-topped; sepals lanceolate, 4-5 mm. long; corolla greenish yellow; 

 lobes ovate, cuspidate-acuminate, 6-8 mm. long; gland elongate, extending from 

 the base to above the middle of the corolla-lobe, obcordate at the summit. Fra- 

 sera albomarginata S. Wats. Dry regions: s Utah Nev. Ariz. Son. 



2. L. utahense (M. .E. Jones) Rydb. Stem glabrous, 1-2 m. high, erect; 

 basal leaves lanceolate, long-acuminate, 2-4 cm. wide, strongly 3-ribbed and 

 with intermediate ribs; lower stem-leaves opposite, 7-10 cm. long, about 2 cm. 

 wide, gradually tapering to a slender point, the upper bract-like ; inflorescence 

 open, its branches divaricate; sepals broadly ovate, acute or abruptly acuminate, 

 about 4 mm. long; corolla yellowish green, with purple spots; lobes oblong- 

 obovate, obtuse. F. utahensis M. E. Jones. Mountains: s Utah. Son. Je. 



3. L. montanum (Mulford) Rydb. Stem glabrous, 3-9 dm. high; basal 

 leaves narrowly oblanceolate, glabrous, 1.5-2 dm. long; stem-leaves opposite, 

 linear, the upper spreading or reflexed; inflorescence many-flowered, dense; 

 sepals linear-subulate, about 6 mm. long; corolla creamy white; lobes 6-8 mm. 

 long, oblong, acute; glands oblong-obovate, near the base of the corolla-lobes 

 and of scarcely one- third their length, short-fringed on the margins. F. montana 

 Mulford. Mountains: Ida. Submont. Jl. 



4. L. albicaule (Dougl.) Rydb. Stems about 3 dm. high, erect, strict, 

 finely puberulent; basal leaves narrowly linear-oblanceolate, about 1 dm. long, 

 4-15 mm. wide, 3-ribbed; white margins very narrow; stem-leaves opposite, 

 narrowly linear, 6-10 cm. long, the upper spreading or reflexed; sepals linear- 

 lanceolate or linear-subulate, 6-8 mm. long; corolla blue; lobes ovate-lanceolate, 

 acuminate, thin, 8-10 mm. long; gland linear, extending from the base of the 

 corolla-lobes to their middle, fringed at the margin. F. albicaulis Dougl. Hill- 

 sides and meadows: Wash. Ore. Ida. Submont. My-Je. 



25* 



