Rydberg: Notes on Rosaceae 73 



II. Rosa santae-crucis Rydberg, sp. nov. 



Stem 1-2 m. high, dark reddish-brown, glabrous, armed with 

 straight stout infrastipular prickles about I cm. long and more or 

 less flattened; leaves mostly five-foliolate; stipules 1.5-2 cm. long, 

 pubescent as well as densely glandular-muricate, more or less 

 lobed; free portion ovate, obtuse; petiole and rachis villous and 

 glandular-puberulent; leaflets rounded-oval, 1-3 cm. long, rounded 

 at each end, rather simply serrate, with broad ovate teeth, pilose 

 and glandular-puberulent above, villous and conspicuously 

 glandular-muriculate beneath; inflorescence corymbose, many- 

 flowered, leafy-bracted ; pedicels short; hypanthium globose, 

 pilose when young, in fruit 12-15 mm. in diameter; sepals lanceo- 

 late, caudate-attenuate, 15-20 mm. long, villous and glandular- 

 hispid, erect and persistent in fruit; styles included, distinct, 

 persistent; achenes inserted both in the bottom and on the inside 

 of the hypanthium. 



This species suggests closely R. Aldersonii and its relatives, 

 but the prickles are straight. 



California: island of Santa Cruz, 1886, E. L. Greene (in the 

 Greene herbarium). 



12. Rosa Dudley! Rydberg, sp. nov. 



A low shrub 3-5 dm. high; branches reddish or greenish, armed 

 with infrastipular straight prickles 5-10 mm. long, somewhat 

 flattened below, and with smaller scattered prickles on the new 

 shoots; leaves usually five- to seven-foliolate ; stipules narrow, glan- 

 dular-puberulent and conspicuously glandular-dentate; free portion 

 lanceolate; leaflets rounded-oval, or the terminal one rounded- 

 obovate, 1-2 cm. long, conspicuously double-serrate with gland- 

 tipped teeth, pubescent on both sides and glandular-puberulent 

 and somewhat paler beneath; flower corymbose; hypanthium 

 glabrous, subglobose, in fruit about i cm. broad; sepals densely 

 puberulent on both sides, grayish within, glandular-ciliolate, in 

 age 12-15 mm. long, caudate-acuminate; petals about i cm. long. 



In general appearance it resembles somewhat R. sonomensis 

 and R. Bridgesii, but differs from the former in the glabrous, not 

 bristly, hypanthium and from the latter in the persistent styles 

 and sepals, the stouter spines, and larger subglobose fruit. It is 

 most closely related to R. calavera, but differs in the thicker, more 

 hairy leaves and stouter prickles. 



California: near Booles Home, Converse Basin, Fresno 



