492 RosACEAE (;rose EAMILY_) 



surfaxjes ; pedicels and sepals ohscurely or not at all glandular, (i?. hispidus, 

 var. suberectus Peck ; li. setosus of auth., in part, not Bigel.; B verniontanm 

 Blanchard ; B. semisetosus Blanchard?) — Open places, e. Que. to N. Y. and 

 Mich. 



31. R. permlxtus Blanchard. Recurving and soon pros^rafe ; stems (as well 

 as petioles, rhachis, pedicels, etc.) densely glandular-hispid and armed with 

 scattered stronger straightish or more often curved prickles; leaflets glabrous 

 above, velvety beneath, rather small, those of the flowering canes 2-6 cm. long; 

 racemes few-flowered, short; flowers 1.5-2 cm. broad; calyx glandular-hispid ; 

 petals oblong-spatulate ; fruit short-cylindric, with few large drupelets, sw^eet.— 

 Dry soil in open places, s, e. Vt. 



32. R. tardsltus Blanchard. Decumbent, becoming prostrate ; the subteretQ 

 slender stems with numerous straightish prickles, but with few or no glands; 

 petioles smooth or sparingly prickly ; leaflets smooth on both surfaces, those of 

 the flowering stems 4-10 cm. long ; racemes somewhat compound, corymbiforra ; 

 pedicels glandular-hispid, occasionally setulose ; flowers 2 cm. broad ; petals 

 narrowly obovate ; fruit globose, of few large sour drupelets. — Sandy soil, 

 York Co., Me. — Perhaps merely a form of the next. 



33. R. jacens Blanchard. Similar, but the stem more glandular; leaflets of 

 the flowering stems 2-5 cm. long ; sepals dorsally free from glands; fruit globose, 

 of a few sweet drupelets. — Dry open places, s. w. N. H. 



34. R. hlspidus L. Prostrate or nearly so ; the slender terete often elongated 

 stems more or less beset with retrorse prickles ; the branches suberect, 5-30 cm. 

 high ; leaflets glabrous on both surfaces, of firm texture, subcoriaceous, rather 

 dark green and somewhat shining above; racemes feivfloivered, corymbiform ; 

 rhacliis and pedicels occasionally setulose ; flowers 1.5-2 cm. broad ; fruit small, 

 reddish-purple, of few small sour drupelets. — Low woods and swampy meadows, 

 N. S. to s. w. Ont. and N. C, common. 



35. R. trivialis Michx. Prostrate ; stems terete, elongated, slender, armed 

 (as are also the petioles and often the peduncles) with broad-based flattish short 

 hooked retrorse prickles, not conspicuously glandular; leaflets coriaceous, ever- 

 green, elliptical, rather sharply serrate ; peduncles l-S-floioered , flowers 3-4 cm. 

 broad ; petals Ijroadly obovate ; fruit cylindrical, of many drupelets. — Dry 

 soil, Va. to Fla. and Tex., near the coast. 



36. R. rubris^tus Rydb. Similar ; the stems, petioles, and especially the 

 pedicels glandular-hispid with reddish or purplish hairs ; corymbs S-9-flowered ; 

 flowers 1.5-2.5 cm. broad; petals oblong-spatulate. — Sandy soil. Mo. to La. 

 and Fla. 



37. R. villbsus Ait. (Dewberry.) Becoming prostrate; stems elongate, 

 subterete, rather woody, armed with stout slender retrorse straightish prickles ; 

 fruiting branches upright, 1-3 dm. high, (l-y?,-\b flowered ; leaflets rhombic- 

 obovate, doubly and rather finely serrate, acutish, membranaceous, smooth or 

 sparingly villous beneath ; flowers in leafy corymbiform racemes, 2-3 cm. broad; 

 sepals not foliaceous ; fruit subglobose to short-cylindric, with few-many large 

 juicy drupelets. (B. canadensis of auth., not L.; B. procumbens Muhl.) — Dry 

 open places, s. Me., westw. and southw., common. Var. roribaccus Bailey. 

 (LucRETiA D.) A large-flowered extreme, with elongated pedicels; the, flowers 

 4 cm. broad; sepals often foliaceous. — W. Va., where doubtfully native; and 

 in cultivation. 



Var. humifiisus T. & G. Stems slender, less woody; flowering branches 

 chiefly \-flowered ; flowers large, 3-4 cm. broad. (B. Enslenii Trattinick ; B. 

 Baileyanus Britton ; B. subuniflorus Rydb.) —Chiefly near the coast, from e. 

 Mass. southw. 



_ (Several recently proposed species are obviou.sly related to and not very clearly 

 distinct from i?. villosus and await further study.) 



38. R. invisus (Bailey) Britton. Similar, but stouter ; the canes less pro- 

 cumbent ; leaflets, especially those of the vegetative shoots, .dimply and rather 

 coarsely toothed; pedicels long (becoming 1.5 dm. in length) ; sepals large, 

 foliaceous. — N. Y. to Kan. and southw. — The original of several cultivated 

 Dewberries. 



