96 Rhodora [May 
formibus basi attenuatis succulentis 1.1-1.3 cm. longis 7-8 mm. 
crassis; sepalis lanceolato-ovatis dorso laevibus vel pilosis plus 
minusve glanduloso-ciliatis sub anthesin arcte reflexis persistentibus, 
laminis 5-7 mm. longis, appendiculo foliaceo glanduloso-ciliato 4-8 
mm. longo; petalis roseis 1.7-2 cm. longis; stylis distinctis persis- 
tentibus nec exsertis; achaeniis basilaribus parietalibusque. 
Stems 3-5 dm. high; the adult unarmed or sparsely setose, pur- 
plish: branchlets unarmed, glabrous: stipules dilated, adnate, 1-2 
cm. long, glandular-pulverulent beneath, conspicuously glandular- 
ciliate; the free blades semi-ovate: petiole and rhachis glandular- 
pulverulent and -setulose: leaflets 5-7, mostly 7, cuneate-obovate, 
chiefly rounded or subtruncate at summit, coarsely and simply or 
doubly serrate above the middle, short-pilose on both surfaces, 
glandular on the nerves beneath, 1-3.5 cm. long: flowers solitary or 
paired: pedicels 1-1.5 cm. long, glabrous: hypanthium glabrous, 
ovoid, in anthesis 3.5-4.5 mm. in diameter; in fruit becoming pyri- 
form with attenuate base, succulent, 1.1-1.3 cm. long, 7-8 mm. thick: 
sepals lance-ovate, smooth or pilose on the back, more or less glandular- 
ciliate, after anthesis tightly reflexed and persistent; the blades 5-7 
mm. long; the foliaceous glandular-ciliate appendage 4-8 mm. long: 
petals roseate, 1.7-2 cm. long: styles distinct, persistent, not exserted: 
achenes borne at the base and on the walls of the hypanthium.— 
QUEBEC: abundant on dry calcareous ledges, Cap Enragé, Bic, 
Rimouski Co., July 8, 1905, Williams, Collins & Fernald (TYPE in 
Gray Herb.). 
A very distinct shrub, differing from R. blanda Ait. and R. acicularis 
Lindl. in the tightly reflexed very short sepals and very small hypan- 
thium and fruit; from R. virginiana in the small smooth sepals and 
smooth fruits, the parietal achenes, pubescent foliage, etc., and from 
R. johannensis, described above, in the much smaller flowers and small 
pyriform fruit, very glandular stipules, petiole and rhachis and 
pubescent more cuneate leaflets. At the type locality R. Williamsiti 
occurred on dry calcareous ledges with Woodsia oregana D. C. Eaton, 
Draba stylaris J. Gay, Arabis Collinsii Fernald and other calcicolous 
xerophytes. 
Gray HERBARIUM. 
