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248 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



5. SOLANUM L. 



Solarium rostratum Dunal, the buffalo bur, native of the western U. S., was col- 

 lected at Alexandria by C. L. Pollard, June 15, 1896, and has been reported from 

 Mount Rainier. 



Plants prickly. Flowers white or bluish 1. S. carolinense. 



Plants not prickly. 



Flowers white; fruit a small black berry; plant not climbing 2. S. nigrum. 



Flowers purple or blue; fruit a red berry; plant climbing 3. S. dulcamara. 



1. Solanum carolinense L. Horse nettle. 

 Common weed in gardens and waste places. May-Sept. Eastern U. S. 



2. Solanum nigrum L. Nightshade. 

 Shaded woods and waste places; common. July-Sept. Cosmopolitan. 



3. Solanum dulcamara L. Bittersweet. 

 Woods or waste places; uncommon. May-Sept. Native of Eur.; escaped from 



cultivation in N. Amer. 



137. SCROPHUIARIACEAE. Figwort Family. 



Leaves all or mostly alternate, only the very lowest, if any, opposite or whorled. 

 Flowers all borne in the axils of the leaves, on long, very slender pedicels, yel- 

 lowish and purplish. Leaves entire except for lobes at the base; plants very 

 hairy, prostrate 2. KICKXIA. 



Flowers all or mostly in spikes or racemes. 



Leaves deeply lobed. Flowers yellowish or reddish; plants hairy. 



20. PEDICULARIS. 



Leaves entire or merely toothed. » 



Corolla spurred, blue or yellow; leaves entire, linear; plants glabrous or 



nearly so 3. LINARIA. 



Corolla saucer-shaped, not spurred, yellow or white; leaves more or less toothed, 



^roaci; plants more or less hairy or densely woolly 1. VERBASCTJM. 



T^avas opposite, at least most of them, those of the inflorescence sometimes alternate. 

 Hjnts rrees. Leaves very large, broadly ovate; flowers violet. . . .7. PATJLOWNIA. 

 rlants herbaceous. 

 Leaves all entire. 



Leaves whorled, broadly oblong; flowers minute, white or purplish, very 



irregular 13. MICRANTHEMUM. 



Leaves opposite, linear; flowers large, showy, purple or rose-colored, nearly 



regular 18. AGALINIS. 



Leaves, at least some of them, toothed or lobed, sometimes only very slightly 

 toothed. 

 Flowers borne in the axils of the leaves, the subtending leaves not much smaller 

 than the other stem leaves. 

 Leaves, at least the upper ones, more or less lobed, sometimes only with 

 small lobes at the base. 

 Lower leaves lobed or toothed; corolla yellow; branches of the inflor- 

 escence with viscid pubescence 17. ATJREOLARIA. 



Lower leaves entire; corolla purple or white; branches of the inflor- 

 escence not viscid. 

 Plants rough-hairy; leaves sessile; corolla nearly regular. 



19. OTOPHYLLA. 



Plants nearly glabrous, with only minute hairs; leaves short-stalked; 



»^'a 2-lipped, the upper lip hooded 21. MELAMPYRUM. 



