390 Ari'KNDix. 



leaves and caulis appear clothed with distant, hispid hair, 

 which I have not observed in my Canadian specimens, nor 

 in those found at Harrisburg, Pennsylvania, on the shores 

 of the Susquehannah. 



XIII. CLASS DIDYNAMIA. 



58. Hyssopus anisatus, Nutt. Gen. II. p. 27. 



On the Plains of Missouri and about Lake Supenoi. 

 (Professor Douglass.) 



Hab. From Falls of St. Anthony to Lake Superior. 



59. Stachys aspera, Nutt. Gen. II. p. 30. 

 Not rare. 



60. Stachys *veliitina, L. v. Schw. 



This may possibly be found on future investigation in 

 nature to be only a variety of S. hispida ; in the specimens 

 before me it certainly presents a very diSerent appearance. 



Stem erect, not branched, quadrangular, villose, or sub- 

 hispid, about one foot high. Leaves alternately opposite, 

 closely sessile, clasping the stem at base, ovate-lanceolate, 

 crenately serrate, and finely sericeously velutinous, or 

 shortly tomentose on the ribs, on both surfaces. Verticills 

 about six-flowered; segments of the calyx acutely pointed, 

 pungent, and extremely hispid. Intermediate segment of 

 the lower lip, broadly rotundate. Corolla somewhat pi- 

 lose and apparently blue. 



61. Dracocephalum virginianum, Pursh, p. 4n. 

 Common in the southern states. 



62. Euchroma coccinea, Nutt. Gen. II. p. 55. 

 /3. lutea. 



Bartsia coccinea lutea, Pursh. 



The specimens are too imperfect to allow a decisive opi- 

 nion whether they belong to a species of Euchroma, 



