94 Rhodora [May 
nivent in fruit, forming a beak-like summit to the hips, a character 
shared with R. acicularis Lindl. and other species which occur west 
of our area. R. blanda is a common rose of the river-thickets from 
northern Maine to the St. Lawrence and Anticosti, but associated 
with it on the gravels of the St. John River and its tributaries in Maine 
and New Brunswick is another shrub which, like R. blanda, is without 
infrastipular prickles on the flowering stems and also has glabrous 
hypanthium and fruit and parietal achenes but the leaves as glabrous 
as in R. virginiana and the sepals as réflexed in mature fruit as in the 
latter species. In other words, this shrub, which abounds on the 
calcareous gravels of the St. John River, shares many traits of R. 
blanda and others of R. virginiana, yet is thoroughly distinct from 
either. That it is not a hybrid occurring along the borders of the 
ranges of R. blanda and R. virginiana is apparent from the fact that 
it occurs entirely outside the range of the latter species. So charac- 
teristic is this shrub of the St. John Valley that it may appropriately 
be called 
Rosa johannensis, n. sp., caulibus 0.3-1 m. altis, adultis inermibus 
vel imis setosis rufescentibus, junioribus plus minusve setosis vel rare 
aculeatis, aculeis rectis basi dilatis; ramulis inermibus glabris lucidis 
plerumque purpurascentibus; stipulis dilatatis adnatis 1.5-3 cm. 
longis glabris ciliatis plus minusve glanduloso-dentatis, laminis 
liberis lanceolato-ovatis; petiolis rhachibusque glabris vel sparsissime 
pilosis glabratisque inermibus; foliolis 5-9 plerumque 7 ovalibus vel 
anguste obovatis argute serratis supra sublucidis subtus pallidis 
glabris vel subtus ad venas sparse pilosis 1.5-5.5 cm. longis; floribus 
solitariis vel corymbosis; pedicellis 1-3 cm. longis glabris; hypanthio 
glabro subgloboso supra non attenuato basi rotundato in anthesi 
5-9 cm. diametro; fructibus oblato-globosis aurantiaco-rubris 1-1.5 
cm. diametro; sepalis plus minusve glandulosis lanceolato-ovatis 
caudato-appendiculatis sub anthesin divergentibus vel reflexis per- 
sistentibus, laminis 0.9-1.4 cm. longis appendiculð 1.2-2 cm. longo; 
petalis roseo-purpureis 2.5-3.5 cm. longis; stylis distinctis persistenti- 
bus non exsertis; achaeniis basilaribus parietalibusque. 
Stems 0.3-1 m. high; the adult unarmed or at base setose, reddish; 
the young more or less setose or rarely prickly, with straight broad- 
based prickles; branchlets unarmed, glabrous, shining, usually pur- 
plish: stipules dilated, adnate, 1.5-3 cm. long, glabrous except at the 
ciliate margin, more or less glandular-dentate; the free blades lance- 
ovate: petioles and rhachis glabrous or very sparsely pilose and 
becoming glabrate, unarmed: leaflets 5-9, usually 7, oval or narrowly 
obovate, coarsely serrate, somewhat shining above, pale beneath, 
glabrous or sparsely pilose on the nerves beneath, 1.5-5.5 cm. long: 
