242 DATISCACE.E. Majurrhlzn. 



Angela (-ami», Caluvcnis t'ounty {lUth, liUjdow) ; near riacerville, Kello(j(j, Bolanulc.r. Sjieci- 

 inens collected by Fremont, llulse, antl oliicis, in tlie same legion (.IVom the Mokchimne Hiver to 

 the Upiicr Sacramento), may belong here tiioiigh with the ovary 3- or 4-celled, and in some other 

 minor resjiects ilillcrent. 



5. M. Guadalupeiisis, ^V^ltson, 1. c. Nemly glabmus, the inllurcacunco suiue- 

 M'liut iiiibcdceiiL : liiuvus tliiu, 3 to 8 iuciii's bruutl, 3-51ubeil to the luiddle, tlio 

 lower lobes qiiiuh-angiilar, the upper acuuiinute, with few short teeth ; racemes 

 nearly simple, 4 to G inches long : eulyx-tecth liliform : comlla G to 8 lines broad : 

 fertile llowers without abortive stamens : ovary on a slender pedicel an inch lonf(, 

 ovoid, densely covered with short scd't spines, 2-celled ; ovules 1 or 2 in each cell, 

 ascending : fruit ovoid, H to 2 inches long, acute above, somewhat pubescent and 

 with short scattered still spines, usually 2-seeded : seeds subglobose, an inch in 

 diameter, attached to the inner side of the cell, the margin smooth. 



Guadalupe Island, on high rocks near the centre ol' the island, Paiiiier, 1875. 



Order XLII. DATISCACEiE. 



A very small and peculiar order, chielly represented by the following genus of 

 only two species. 



1. DATISCA, binn. 



Flowers dioecious, sometimes perfect. Calyx of sterile flowers very short, with 4 

 to 9 unequal lobes : stamens 10 to 25 ; iilaments short : rudimentary ovary none. 

 Pistillate flowers witii calyx-tube ovoid, somewhat 3-angled, 3-toothed : stamens 

 three, when present, alternate with the teeth : styles 3, bifid, opposite the teeth, the 

 linear lobes stigmatic on the inner side. Capsule oblong, coriaceous, 1 -celled, open- 

 ing at the apex between the styles. Seeds very numerous and small, in two to 

 several rows upon the 3 parietal i)lacentie : embryo cylindrical, in the axis of small 

 albumen. — Smooth stout perennial herbs; leaves une(]ually I'innatifid, with coarsely 

 toothed lanceolate segments, the U]iper scarcely lobed ; flowers axillary, fascicled, 

 nearly sessile. 



Only two species known, one native of W. Asia, the other of California. 



1. D. glomerata, llfnMi. <K; Hook. Erect, 2 or 3 feet high or more, branching ; 

 Icavi's ovate to iaiHcolatc. in outline, acuuduate, (i incluss long, the numcrdus lloral 

 ones shorter and more narrowly lanceolate : llowers 4 to 7 in each iixil td' the. elon- 

 gated leafy raceme, the fertile mostly perfect : anthers nearly se-ssile, 2 lines long : 

 styles longer than the ovary : capsule oblong-ovate, 3 or 4 lines long, slightly nar- 

 rowed toward the truncate triangular 3-toothed summit. — Gen. PI. i. 845. 2'ri- 

 cerastes glomerata, Presl, Piel. Huenk. ii. 88, t. 64; Lindl. Veg. Kingd. 310, fig. 



On stream-banks from Napa County to San Dernardino, and in the foot-hills of the SiiM ra Nevada 

 from Amador to Tuolumne County. 



Order XLIIT. CACTACE^. (By Dr. George Engelmann.) 



Green fleshy and thickened persistent nio.-stly lealless i)lants, of peculiar abj)ect : 

 globular or columnar, tuberculated or ribbed, or jointed and often flattened, usually 

 armed with bundles of spines from the " areola;," which constitute the axils of the 

 (mostly absent) leaves. Flowers with numerous sepals, petals, and stamens, usually 



