64 CDCURBITACE^. 



Leaves pectinately pinnatifid to sinuate-toothed: petals 1 to 24 inches long 6, 



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

 micrantha, T. 4 G. Leaves ovate, I inch long or less: seeds a line long, 

 congesta, T. & G. Bracts membranona at base : petals 3 to 6 lines long, 

 gracilenta, T. Sc G. Petals obovate to oblanoeolate, 4 to 8 lines long, 

 landleyi, T. & G. Leaves ovate or narrower; petals ovate. Cent CaL 

 IsBvicaulis, T. 4. G. Stout: leaves 2 to 8 inches long: petals 2 to 2J inches long. 



CUCURBITACE^. 



Flowers all solitary, large, yellow: seeds flat ..•. 1 



Flowers small, white; the sterile racemose: seeds tnrgid 3 



1. CUCURBIT A, LinniBua. 



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. Califomica, Torr. Flowers an inch long or more; calyx 4 or 5 lines long. 



2. MEGARBHIZA, Torrey. 



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



2. M. macrocarpa. 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.-Waah. 



6. M. imiricata, Watson. Fruit globose, an inch long, 2-seeded, mostly naked. 



Perhaps this genus fihoulc^ be united with IJchvnoGystis, which has flat seeds. 



The second epeoies is deserlb«d by E L. Greene under the name EchiTtocystU macrocarpa. 



DATISCACE.E. 



1. DATISCA, Linnaena. 

 L D. gloznerata, B. &; H. Dioecious or perfect flowers in leafy spikes, greenish. 



CACTACE.J:. 



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



Depressed-globose plants with tuberculate ribs and woolly at top : spines stout, ringed 3 



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



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



