170 CACTACE.E. (CACTUS FAMILY.) 



1. T. Boykinii, Roem. Rough-pubescent; leaved broadly cordate, 3 -5- 



lobed ; the lateral lubes entire or toothed, the middle one cuspidate ; sterile 

 and fertile flowers intermixed, 3-5 in a cluster, sliort-pedicelled ; styles 

 united ; fruit 3-seeded ; the seeds 3-toothed at the base. River banks, Georgia, 

 and westward. June -July. Stems elongated. Flowers greenish white. 



Berry crimson. 



2. MELOTHRIA, L. 



Flowers polygamous or monoecious. Calyx of the fertile flower narrowed 

 above the ovary ; the sterile ones campanulate. Petals 5, united into a cam- 

 pan ulate corolla. Stamens 5, triadelphous : anthers tortuous, connate, at length 

 separate. "Style single, with a cup-shaped disk surrounding its base. Stigmas 

 3. Fruit oval, smooth, many-seeded. 



1. M. pendula, L. Stem filiform, smooth ; leaves rough, cordate, with 

 3-5 angular-toothed lobes ; sterile flowers in small racemes ; the fertile soli- 

 tary, on long peduncles ; fruit oval, blackish, drooping. Light soil, Florida 

 to North Carolina, and westward. May - August. Flowers small, yellow. 



3. SICYOS, L. 



Flowers monoecious. Calyx flattish, with 5 subulate or minute teeth. Pet- 

 als 5, united below into a rotate corolla Stamens 5, monadelphous or tria- 

 Jelphuus. Ovary 1 -celled, 1-ovuled Style slender. Stigmas 3. Fruit 

 membranaceous, bristly, 1 -seeded. Annual herbs. Sterile and fertile flowers 

 mostly from the same axil. 



1. S. angulatus, L. Plant hairy and clammy; leaves thin, cordate, 

 with 3 - 5 acuminate denticulate lobes ; sterile flowers racemose ; the fertile 

 ones in peduucled clusters, whitish. River banks, Florida, and northward. 

 June -August. 



4. ECHINOCYSTIS, Torr. & Gray. 



Flowers monoecious. Calyx 6-toothed. Petals 6, united at the base, spread- 

 ing. Stamens of the sterile flower 3, 2 of the anthers united. Fertile flower 

 with a 2-celled ovary, and 2 erect ovules in each cell. Stigma broad. Fruit 

 prickly, at length dry and bursting at the summit, fibrous within. Seeds 

 large, flat. Climbing herbs, with small greenish white flowers, the sterile 

 numerous in long compound axillary racemes, with single or clustered fertile 

 ones at its base. 



1 E. lobata, Torr. & Gray. Annual, smoothish ; leaves thin, acutely 

 5-lobed ; fruit oval, 2' long. River banks, Tennessee. July. 



The common GOURD or CALABASH (LAGENARIA VULGARIR, 

 originally from the tropics, is generally diffused over the Southern States, in 

 waste places and around dwellings. 



ORDER 05. CACTACEJE. (CACTUS FAMILY.) 



Succulent, shvulVby, and commonly leafless and prickly plants, with 

 globular, or columnar and angular, or flattened and jointed stems, and 



