220 PROCEEDINGS OF THE AMERICAN ACADEMY 



* Stem simple, strict, leafy, from a scaly bulb : floral bracts leaf-like : anthers 

 versatile : styles elongated : capsule not triquetrous : seeds flat, horizontal. 



26. Lilidm. Perianth-segments oblanceolate, more or less spreading 

 or recurved, often dotted or spotted ; nectary a linear groove. 

 Anthers distinctly versatile. Style undivided. Bulb-scales lan- 

 ceolate. 



27. Fritillaria. Perianth-segments broader and concave, often 

 mottled; nectary a shallow pit. Anthers more obscurely versa- 

 tile. Styles united to the middle or throughout. Bulb-scales 

 mostly short, very thick. 



* * Stem simple, low, lax, from an oblong membranous-coated corm, bearing 

 a pair of dilated leaves, without floral bracts : anthers basifixed : styles elon- 

 gated : capsule triangular or triquetrous : seeds ascending, turgid, brownish. 



28. Erythronium. Perianth-segments oblanceolate, strongly revo- 

 lute, mostly callous-toothed at base each side of the grooved 

 nectary. Styles usually distinct above. Seeds obovoid, angled, 

 the testa loose and rugose at top. 



* * * Stem simple, dwarf, from a small tunicated bulb : leaves linear, with- 

 out veinlets : perianth persistent, the equal segments 3-nerved, with a naked 

 obscure gland at base : anthers very small, basifixed : style slender, undivided, 

 persistent : capsule triquetrous : seeds horizontal, flat. — Subtribe Lloydie^e. 



29. Lloydia. Perianth small, spreading, white with purplish veins 

 and base. Stem slender, leafy, usually 1-flowered ; the bulb 

 upon an oblique rhizome, covered by the persistent scarious bases 

 of the nearly filiform leaves. Arctic or alpine. 



* * * * Stem usually branched, from a coated corm, sparingly leafy : leaves 

 with transverse veinlets : perianth of unequal segments, the outer smaller, some- 

 what greenish and sepaloid, the inner dilated and mostly with pitted and bearded 

 or crested glands : anthers basifixed : stigmas sessile, distinct, recurved, per- 

 sistent : capsule usually deeply triquetrous, mostly septicidal : seeds ascending, 

 with light-colored spongy testa, rarely flat and horizontal. — Subtribe Calo- 



CHORTEjE. 



30. Calochortus. Flowers mostly large and showy, broadly cam- 

 panulate. Stem usually lax or flexuous, from a membranous- or 

 rarely fibrous-coated corm. 



Tribe XI. Uvularieae. Flowers terminal or pseud-axillary, solitary or 

 subumbellate, with naked pedicels on leafy branching stems (or in CRntonia on 

 a scape-like peduncle) from a short or creeping rootstock : perianth narrowly 

 campanulate ; segments oblanceolate, with a nectariferous groove at the 

 narrow subgibbous base : anthers linear : styles linear, more or less united, 

 stigmatic down the inside : fruit a loculicidal or tardily dehiscent capsule, or 

 berry -like : seeds pendulous: stems scaly-bracted below: leaves dilated, with 

 numerous nerves and transverse veinlets (reticulated in Prosartes). 



