RYDBERG: NOTES ON ROSACEAE ye 
tr. Rosa santae-crucis Rydberg, sp. nov. 
Stem 1-2 m. high, dark reddish-brown, glabrous, armed with 
straight stout infrastipular prickles about 1 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. Aldersonui and its relatives, 
but the prickles are straight. 
CaLrForniA: island of Santa Cruz, 1886, E. L. Greene (in the 
Greene herbarium). 
12. Rosa Dudleyi 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 1 cm. broad; sepals densely 
puberulent on both sides, grayish within, glandular-ciliolate, in 
age 12~15 mm. long, caudate-acuminate; petals about 1 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 
