DIDYNAMIA QYMNOSPERMIA. 



75 



•verticillis 



s 



floris 



iibqiiadri 



rate; whoHs generally 



? 



calycibiis gla- 4-flowered ; calyx gla- 



brous. 



briusculis. 



*• Pursh 2. p. 407. 



S. arvensis Walter p. lG2. 



Stem about 2 feet high, sqiiare,hispid along the angles, the bristles gen- 

 ^a.\\y rqtrorse. Leaves nearly sessile, ver^ oblong, ovate, acute, serrulate 

 rather than obtusely serrate, somewhat hispid on both surfaces. ^Calyx 

 generally 4 in each whorl, the teeth prominent and very acute, their mar- 

 gins and the angles pf the calyx pubescent. Corolla larger than in our 

 other species, rather longer than the stamens^ yellowish purple. 



Grows in the we,t pine barrens of Carolina. 



Flowers June 



igusL 



4' 





ASPERA. 



iS. caiilibus erectis 



5 



Stems erect, retro 



1 



whorls generally 



? 



rate, nearly glabrous 



6- 

 floweredj teeth of the 

 calyx divaricate, spiny. 



•etrorsum hispidis; fo- sely hispid ; leaves li- 

 liis lineari lanceolatis, j near lanceolate, ser 

 serratis, glabriuscuhs; 

 verticillis subsexfloris, 

 calycibus divaricato- 

 spinescentibus. 



Mich. 2. p. 5. Pursh 2. p. 407- 



l^m uncertain whether I am not referring to the S. Aspera of Midi- 

 Hux a plant which may belong to another species. Stem 18—24 inches 

 high j square, the angles fringed with retrorse bristles. Leaves long (2—3 

 inches) very narrow, sessile, acute,finelyjsorrulate, the margins fringed and 

 the vems sprinkled with short acute bristles. Flowers generally 6 in a 

 whorl. Teelluail ^^^ mb^ very acute, somewhat divergent and with the 

 angles fringed with short bristles. Carol 

 purplisli Stamens as long as the corolla. 



than 



Orows 



rs June 



■Au^jst. 



4. Tenuifolia. 



S. caule erecto, an 



gulato, subla;vi 



fohis 



petiolatis.ovali lanceo- 



Stem erect, angled, 

 nearly smooth ; leaves 



on petioles, ova Man 



i 



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■fp 



^ 



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