64 CUCURniTACE^. 



Leaves pectinately pinnatifid to sinuate-toothed: petals 1 to 2J inches long 5, 6 



dispersa, Watson. Only upper leaves ovate: seeds ^ line long, 

 micrantlia, T. & G. Leaves ovate, 1 inch long or less: seeds a line long, 

 cong-esta, T. & G. Bracts membranous at base: petals 3 to 6 lines long, 

 gracilenta, T. & G. Petals obovate to oblanceolate, 4 to 8 lines long. 

 Lindleyi, T. & G. Leaves ovate or narrower: petals ovate. Cent Cal. 

 laevicaulis, T. & G. Stout: leaves 2 to 8 inches long: petals 2 to 2| inches long. 



CUCURBITACE^. 



Flowers all solitary, large, yellow: seeds flat ► 1 



Flowers small, white; the sterile racemose; seeds turgid 2 



1. CUCURBIT A, Linnseus. 



1. C. perennis, Gr. Leaves 6-12 in. long: flowers 3 and 4 in. long, fragrant. 



2. C, palmata, Watson. Leaves 2-3 in. long, 5-cleft: calyx-tube an inch long. 



3. C. Calif ornica, Torr. Flowers an inch long or more; calyx 4 or 5 lines long. 



2. MEGARRHIZA, Torrey. 



Californica, Torr. Fruit globose or ovoid: seeds 4, 8-12 lines long. 



macrocarpa. Fruit ovoid oblong, 14-seeded. Santa Barbara, south. 



Marah., Watson. Fruit 4 in. long: seeds suborbicular, flattened. 



Oregana, Torr. Fruit scarcely or not at all armed with spines. Or, -Wash, 



muricata, Watson. Fruit globose, an inch long, 2-seeded, mostly naked. 



Perhaps this genus should be united with Echinoeystis, which has flat seeds. 



The second species is deseribed by E L. Greene under the name Echinoeystis macrocarpa. 



DATISCACEJS. 



1. BATISCA, LinnaBUs. 

 1. D. glomerata, B. & BL Dioecious or perfect flowers in, leaiy spikes, greenish. 



CACTACEiE. 



Oval or cylindrical plants, covered with spine-bearing tubercles 1 



Depressed-globose plants with tuberculate ribs and woolly at top : spines stout, ringed 2 



Cylindrical ribbed stems branching, 2 to 4 ft. high: spines numerous 3 



Stems made up of flattened or cylindrical joints: spines barbed 4 



