HYMENOCALLIS. 121 



Subgenus Hymenocallis proper. Staminal cup comparatively small 



free part of filaments long. 

 Leaves petioled. Perianth-tube long . Sp. 1-5. 

 Leaves petioled. Perianth-tube short . Sp. 6-9. 

 Leaves sessile. Perianth-tube long . Sp. 10-16. 



Leaves sessile. Perianth-tube short . Sp. 17-24. 



Subgenus Ismene (Salisb.) Staminal cup large ; free tip of filaments 

 short, incurved. 

 Flowers white . . Sp. 25-30. 

 Flowers yellow . . Sp. 31. 



1. H. TUBiFLORA Salisb. in Trans. Hort. Soc. i. 341. H. 

 guianensis Herb. H. petiolata Eoem. Pancratium guianense Gawl. 

 in Bot. Keg. t. 265. P. tubijiormn and petioJatiim Schultes. — Bulb 

 ovoid, 3-4 in. diam., with a short neck. Leaves with a thin oblong 

 acute blade 8-12 in. long, 4-5 in. broad at the middle, narrowed 

 gradually to a petiole -|— 1 ft. long ; midrib broad, distinct ; veins 

 lax. Peduncle compressed, a foot long. Flowers many in an 

 umbel, sessile ; spathe-valves membranous, deltoid-cuspidate, 

 reflexing. Perianth with an erect slender tube 6-8 in. long ; 

 segments linear, about 4 in. long. Staminal cup a narrow funnel, 

 an inch long, not toothed between the fi-ee part of the filament, 

 which is more than twice as long as the cup; anthers linear, -|— | in. 

 long. Style overtopping the anthers. Ovules 4 or more in a cell, 

 crowded at the base of the axis. 



Hab. Guiana, Trinidad, and the Amazon Valley. Introduced into culti- 

 vation at Kew about 1803 from bulbs taken in a captured French vessel from 

 Cayenne, and again by Lambert in 1818. 



2. H. UNDULATA Herb. App. 44. H. Borskiana Be Vriese, 

 Descript. 10. H. Boschiana'Kwiiih. Pancratium imdulatumH.'B.'K. 

 — Bulb ovoid, 3-4 in. diam. Leaves with a thin oblong acute blade 

 a foot long, 5-6 in. broad, narrowed gradually to a long petiole ; 

 veins lax, connected by close oblique cross-bars. Peduncle com- 

 pressed, 2 ft. long. Flowers 9-10 in an umbel, sessile ; spathe- 

 valves 4-5, lanceolate. Perianth-tube 6-7 in. long ; segments 

 linear, 3-3| in. long. Staminal cup funnel-shaped, an inch long, 

 toothed between the free part of the filaments, which is 1^ in. long, 

 tinged with red; anthers linear, ^ in. long. Style much overtopping 

 the anthers. 



Hab. Venezuela, Fendler 1504 ! First gathered by Humboldt. Introduced 

 into the Botanic Garden of Leyden in 1845 by M. Borski. 



3. H. MoRiTziANA Kunth, Enum. v. 668. — Bulb as thick as a 

 man's fist. Leaves with an oblong acute blade a foot long, 

 narrowed gradually to a long petiole. Peduncle compressed, 

 l-|-2 ft. long. Flowers about 20 in a sessile umbel ; outer spathe- 

 valves large, reflexed. Perianth-tube 4|- in. long ; segments 

 linear, nearly as long as the tube. Staminal cup funnel-shaped, 

 under an inch long, toothed between the free tips of the filaments, 

 which are Ij in. long; anthers linear. Style reaching to the tip 

 of the segments. Ovules 4 in a cell. 



Hab. Caracas, Moritz. 



