146 HEXANDRIA.— -TRIGYNIA. 



D. Flowers incomplete. (Perianth single, re- 

 sembling a calyx.) 



250. ORONTIUM. Spad. cylindric, crowded with 



flowers. Cor. 6-petalled, naked. Style and 

 stig. scarcely any. Utric. 1 -seeded. 



251. ACORUS. Spad. cylindric, covered with flowers. 



Cor. 6-petalled, naked. Stig. sessile, very mi- 

 nute. Caps. 3- celled. 



252. JUNCUS. Perian. 6-leaved, glumaceous. Caps. 



superior, 3-celled, 3-valved ; cells many-seeded. 

 Seeds attached to a partition in the middle of 

 each valve. 



253. LUZULA. Perian. 6-leaved, glumaceous. Caps. 



superior, 3-celled, 3-valved ; cells 1 -seeded. 

 valves without partitions. 



TRIGYNIA. 



254. MELANTH1UM. Polygamous.— Cal. 0. Cor. 



6-parted, rotate ; segments unguiculate, with 2 

 glands at the base of each ; claws staminiferons. 

 Caps, subovate, 3-celled ; apex partly trifid. 

 Seeds numerous, membranaceously winged. 



255. VERATRUM. Polygamous.— Cal. 0. Cor. 6- 



parted, expanding ; segments sessile, without 

 glands. Stam. inserted upon the receptacle. 

 Cap. 3, united, many-seeded. 



256. HELONIAS. Cor. 6-parted, spreading, without 



glands. Styles 3, distinct. Caps. 3-celled, 3- 

 horned, cells few-seeded. 



257. XEROPHYLLUM. Cor. subrotate, deeply 6- 



parted. Fil. contiguous at the base. Stig. 3, 

 revolute, partly united below. Caps, subglo- 

 bose, 3-celled ; cells 2-seeded, opening at the 

 summit. 

 558. TOFIELDIA. Cal. 3-leaved. Pet. 6. Anth. 

 roundish. Styles vertical, short. Caps. 3. su 

 perior, united at the base, many-seeded. 



