248 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



y 9. Ribes hystrix, sp. no v. 



Plate XXIV, Figs. loa-io^. 



Shrub several feet high, with light brown, tortuous branches, minutely 

 pubescent and thickly beset with stout, rigid, horizontal, yellow prickles, 

 some gland-tipped, generally small on the new growth, and increasing in size 

 with age; axillary thorns triple, stout, distinct at base, middle one longest, 

 becoming 15 mm. long, lower part pubescent, upper, glabrous. Leaves thin, 

 three-lobed or some five-lobed, with the basal lobes small, 2-4 cm. wide, 

 orbicular-reniform, incisely dentate, minutely pubescent and dotted with 

 sessile glands on the lower surface, almost glabrous on the upper; petioles 

 about as long as the blade, tomentose and slightly glandular. Peduncles 

 one- to three-flowered, 1-2 cm. long, ascending, slender, sparingly pilose 

 and clothed with gland-tipped hairs; pedicels less than half as long, occasion- 

 ally longer; bracts orbicular or lobed, clasping, acuminate to obtuse. Calyx 

 pubescent and glandular; tube a little longer than the ovary; divisions i cm. 

 long, surpassing the rest of the flower when reflexed, 3 mm. wide, lower 

 part purple, near the apex greenish, obtuse. Petals white, broadly obovate 

 when spread out, acute, narrowed to a short claw, involute, 4 mm. long. 

 Stamens with broad filaments dilated at base, as broad and long as the 

 anthers; these about 3 mm. long, sagittate at base, tipped with a blunt mucro. 

 Styles surpassing the sepals in the opening flower, divided about half; stigmas 

 small, capitate; ovary globular, tomentose, and densely clothed with purplish 

 bristles, some near the calyx gland-tipped. Fruit purple, more or less 

 densely clothed with stiff", spreading prickles, 2-5 mm. long. 



This species is nearest to R. menziesii Pursh but differs 

 in the glandular pubescence, the shape and texture of the 

 leaves, the size of the flower, and shape of the parts. 



Collected in flower by Mr. R. A. Plaskett, at Gorda, 

 Santa Lucia Mountains, California, December, 1897. The 

 fruiting specimens were collected by the author at Pacific 

 Valley, in the same vicinity, May, 1897, and June, 1893. 



