CUCURBITACE^E. 



129 



Leavea pectin atcly pinnatifid to sinuate-toothed: petals 1 to 2$ inches long 5 9 6 



!. M. dispersa, Watson. Only tipper leaves ovate: seeds line long. 



2. HE. micrantha, T. & 6. Leaves ovate, 1 inch long or less: seeds a line long. 



3. M. congest a, 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. 



5. M. Lmdleyi, T. A G. Leaves ovate or narrower: petals ovate. Cent. Cat 



6. M. laevicaulifl, T. & G. Stout: leaves 2 to 8 inches long: petals 2 to 2i inches long. 



CUCUKBITACEJJ. 



Flowers all solitary, large, yellow; seeds flat . ,,....... 1 



Flowers small, white; the sterile racemose: seeds turgid. 8 



1. CUCUBBITA, Lumens. 



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



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



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



2. MEGABBHIZA, Torrey. 



1. M. Califomica, Torr. Fruit globose or ovoid: seeds 4, 8-12 lines long. 



2. M. xnacrocarpa. Fruit ovoid oblong, 14-seeded. Santa Barbara, south. 



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



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



5. M. 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 described by E L. Greene under the name Echinocyttis maonoarpa. 



DATISCACEJE. 



1. DATISCA, Linnaeua. 

 IX glomerata, B, & H. Dioecious or perfect flowers in leafy spikes, greenish. 



CACTACEJ:. 



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



Depressed-globose plants with tubercnlate ribs and woolly at top: spines stout, ringed 9 



Cylindrical ribbed stems branching, 2 to 4 ft. high: spines numerous 8 



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



