492 ROSACE AE (ROSE FAMILY^ 



surfaces ; pedicels and sepals obscurely or not at all glandular. (R. hispidus, 

 var. suberectus Peck ; B. setosus of auth.. in part, not Bigel.; 7^ vcrmontanus 

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

 Mich. 



31. R. permixtus Blanchard. Recurving and soon prosfrafe; 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, sweet. — 

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



82. R. tardatus Blanchard. Decumbent, becoming pi'ostrate ; the suhterk-te 

 slender steins with numerous straightish prickles, but with fevj <>r no glands; 

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

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

 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. hispidus 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. mther 

 dark green and somewhat shining above ; racemes feic-floicered, corymbiform: 

 rhachis and pedicels occasionally setulose ; flowers 1.5-2 cm. broad ; fndt small, 

 reddish-pujple, 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) vnth broad-based flattish short 

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

 green, elliptical, rather sharply serrate ; peduncles \-S-flowered , flowers 3-4 cm. 

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

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



36. R. rubrisetus Rydb. Similar ; the stems, petioles, and especially the 

 pedicels glandular-hispid with reddish or purplish hairs ; corymbs S-9-flou'ered ; 

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

 and Fla. 



37. R. vill5sus Ait. (Dewberry.) Becoming ;;ros^ra^e ,* stems elongate, 

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

 fruiting branches upright, 1-3 dm. high, (\-)'^>-\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 ; 

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

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

 open places, s. Me., westw. and south w., 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. humifusus T. & G. Stems slender, less woody; flowering branches 

 chiefly I -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 obviously related to and not very clearly 

 distinct from B. villosus and await further study.) 



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

 cumbent ; leaflets, espjecially those of the vegetative shoots, simply 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. 



