LILIACE/E 



145 



+ f Hull) scaly: stem simple, strict, leafy nml leafy-Liactcate: anthers versatile: seeds flat, liorizonUil. 



18. Lilium. S(<,'iiiciils ohiaiu'eolate, witli u linear neclarireroiis groove, usually spolteil. Stylo 



uiidivitleil. 15uU)-scales lanceolate. 



19. Fritillaria. Segments broader, concave, often mottled; nectary a sliallow pit. Styles 



united or distinct to the middle, liulb-scales short, very thick. 



++ ++ Stem low, la.x, 2-leaved, from an oblong corm : anthers basili.xed : seeds turbid. 



20. Erythronium. Segments oblanceolute, callous-toothed each side of the grooved nectary. 



+- -1- Outer pcrianth-.scgments smaller, somewhat sepal-like ; the inner broad and usually bearded : 



stigmas sessile. 



21. Calochortus. Stem usually lax or lle.Kuous, from a coated corm. Anthers basifi.xed. Cap- 



sule usually seiiticidal. 



LLOVnrA .sf.rotin.v, Ueichenb., a widely distrihuteil arctic and al|)ine plant, not yet discovered 

 in California, has slender tunicated riiizomatous bulbs, grass-like leaves, low slender sparingly 

 li'afy stems, and a small solitary Mower with spreading persistent 3-nerved segments (wnite, vcnTed 

 with jmrplc), minute basilixe(l anthers, an entire persistent style, and an obovate capsule with 

 Hat seeds. It has been found in the Clover Mountains, Nevada, and in Colorado. 



• • Flowers terminal or apparently axillary, solitary or subumbellate, without bracts, the leafy 

 brandling stems (scape-like i)eduiicle in Clintnnia) from a rootstock ; segments oblauceolate, 

 with a nectariferous groove. Fruit a berry. Leaves broad. 



22. Streptopus. Flowers apparently axillary, mostly solitary on a geniculate pedicel. Fila- 



ments broad, very short. Anthers apiculate. Seeds striate. Leaves with transveree 

 veiiiiets. 



23. Prosartes- Flowers terminal, solitary or fascicled. Filaments slender. Anthers obtuse. 



Seeds smooth. Leaves net-veined. 



24. Clintonia. Flowers solitary or umbellate. Filaments slender, pubescent. Ovary 2-celled. 



Seed smooth, crustaceous. Leaves few, ciliate, with transverse veiiilets. 



» » • Flowers terminal, solitary or in a sessile umbel, subtended by two or three broad leaves 

 ui)oii an otherwise naked stem from a stout rootstock. Perianth-segments unlike. Stigmas 

 sessile, persistent. 

 2."). Scoliopus. Flowers umbellate, upon a very short stem ; outer segments lanceolate, the 

 inner linear, deciduous. Stamens 3. Capsule 1-celled, with 3 parietal placenta;. 

 Leaves a paii. 

 2G. Trillium. Flowers solitary; segments persistent, the outer foliaceou.s. Anthei-s introrse. 

 Fruit fleshy. Leaves 3, in a whorl. 



111. Flowers in a simple raceme or panicle, with distinct persistent sevei-al-nerved segments, 

 subhypogynous stamens with small anthers, anil distinct persistent styles or stigmas. Bracts 

 greenish or sometimes scarious. Leaves with transverse veiiilets. Pedicels not jointed. Cap- 

 sule deeply 3-lobed. 



• Flowers usually polygamous. Anthers 1-celled, peltate on opening. Stems leafy. Leaves not 



rigid nor eijuitant. 



27. Veratrum. Stem tall and stout, from a thick rootstock. Inflorescence paniculate, pubes- 



cent. Leaves broad, strongly nerved and plicate. 



28. Zygadenus. Stem from a coated bulb. Inflorescence a raceme or subpanicuhitc, glabrous ; 



iloweis erect, the segments glandular at base. Leaves linear. 



Strnantiiium is distinguished from Zi/fi'iflniu.t hy it<i nodding flowers and narrow ncuminatc 

 "landless perianth-segments. S. orciDi'-NrAi,!;, Gray, with a loose usually sinijile raceme of yel- 

 lowish-pui j)le (lowers (fJ to 9 lines long), is found in northern Oregon and in Washington Ter- 

 ritory, on streambanks in the mountains. 



• • Flowers perfect on bractcolate pedicels in a simple raceme on an eipiitant-leafy stem from a 



creeping rootstock. Anthers 2-celled, introrse Seeds numerous. 



29. Tofieldia. Flowers involucrate with 3 scarious united bractlets. Filaments naked. Styles 



short. Capsule ovate, 3-beaked. Seeds horizontal, not caudate. 



30. Narthecium. Hractlet linear. Filaments woolly. Style none. Capsule oblong, attenuate 



upward. Seeds ascending, caudate at each end. 



• » ♦ Flowers perfect on naked pedicels in a simple dense raceme upon a very leafy stem from 



a thick rootstock. Styles reflcxed. Leaves very narrow, rigid and rough-edged. 



31. Xerophyllum. Flowers white, on long pedicels ; segments .5 - 7-nerved. Seeds few, not 



ajipendaged. 



