70 



DIDYNAMIA GYMNOSPERMIA. 



ry^ racemes somewhat 

 yerticillate^ terminal ; 

 bracteas twice as long 

 as the calyx. 



centibus ; racemis sub- 

 verticillatis^ terminali- 

 bus ; bracteis calyce 

 duplo iongioribus. 



Sp. pL 3. p. 22. Walt, p, l6U Mich. 2. p. 1. Pursli, 2. p. 405. 

 Smith in Rees' Cyclop^ 



Root perennial. Stem herbaceous, erect, 2—3 feet high, square witft 

 the angles rounded, furrowed, somewhat jomted, pubescent. Leaves o\}- 

 posite, brachiate, somewhat rugose, hoary and alujost tomentose under- 

 neath, on very short petioles. Racemes terminal. Flowers generally 

 Yerticillate, 4 — G in each whorl, the upper flowers inxgular; bracteas su- 

 bulate at the base of each peduncle, about as long the calyx. Peduncles 

 short- Calyx pubescent, ribbed, erect, 5-cleft, the three upper segments 

 broad, the two lower narrower, all acute. Corolla pubescent, pale blue 

 or violet coloured, the tube as long as the calyx, the upper lip divided in-j' 

 to two distant acute segments, the fissure extending into the tube, the low- 

 er lip elongated, S-cleft, the middle lobe extended and rounded. Pila^ 

 meats 4, prominent between the division of the upper, lip. Style as long 

 as the stamens. Stigmas 2, acute. Seeds 4, covered by the persistent 



calyx. 



The two American species of this plant, are still insufficiently discrim- 

 inated. It will be perceived by the foregoing description, that our south- 



ajnees in its bracteas and perhaps its petioles with th 



perhaps its petioles with the next spei^ 

 cies, while its leaves belong to the T. canadense. 



ern plant 



Grows in wet soils, very common. 

 JFIoAvers July — September, 



2. ViRGINICUM. 



T» pubescens; foliis 



ovato-oblongis 



serra- 



tis^ superioribus sub- 

 sessilibus, caule erec- 



Pubescent ; leaves 

 ovate^ oblon&j serrate. 



the upper ones nearly 



to; racemis verticilla- 

 tis^ confertis; bracteis 

 longitudine calycis. 



sessile; stem erect; 

 racemes verticillate, 



crowded; bracteas as 

 long as the calyx- 



Sp, pi. 3. p- 22. Walt- 1. p.^6l. Pursh 2. 



This doubtful or obscure species is said to grow in bogs. Pursh. I 

 Iiave however a specimen sent me from Pennsjivania by Mr. Nuttall as 

 the T. virginicum, in which the leaves are more ovate, on longer footstalks 

 and evidently less discoloured than in our common species, I can in this 

 ajiecimcn discover no other difference. 



Grows in wet ground from Pennsylvania to Carolina. 



Flowers probably likc'thc other species from July to September. 



:* 



