4 CUCURBITACER. 
Leaves pectinately pinnatifid to sinuate-toothed: petals 1 to 24 inches long.......» By 6 
1. M. dispersa, Watson. Only upper leaves ovate: seeds 4 line long. 
2, M. micrantha, T. &G. Leaves ovate, 1 inch long or less: seeds a line long. 
3. M. congesta, T. &G. Bracts membranous at base: petals 3 to 6 lines long. 
4. M. gracilenta, T. &G. Petals obovate to oblanceolate, 4 to 8 lines long. 
6. M. Lindleyi, T. &G. Leaves ovate or narrower: petals ovate. Cent. Cal. 
6. BML levicaulis, T. &G. Stout: leaves 2 to 8 inches long: petals 2 to 2} inchealong. 
CUCURBITACEE. 
Flowers all solitary, large, yellow: seeds flat............-2--eseeee siuubeseosianee a 
‘Flowers small, white; the sterile racemose: seeds turgid.........e.e+secees aisles eterslaras a 
1, CUCURBITA, Linnzus. 
1, ©. perennis, Gr. Leaves 6-12 in. long: flowers 3 and 4 in. long, fragrant. 
2. GO. palmata, Watson. Leaves 2-3 in. long, 5-cleft: calyx-tube an inch long. 
3. ©. Californica, Torr. Flowers an inch long or more; calyx 4 or 5 lines long. 
2. MEGARRGHIZA, 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 Echinocystis, which has flat seeds, ; 
The second species is deseribed by E L. Greene under the name Echinocystis macrocarpa. 
Or wh = 
BEREE 
DATISCACEHR. 
1. DATISCA, Linnzus. 
2. D. glomerata, B.& H. Dicecious or perfect flowers in leafy spikes, greenish, 
CACTACER. 
Oval or cylindrical plants, covered with spine-bearing tubercles..... eSiewaiee scewiniswinis’s 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............ earee 
Stems made up of fattened or cylindrical joints: spines barbed..........ceceeecessee 4 
