182 



DIADECFIIIA OCTANDRIA. 



The remarkable racemes of this plant, which run just under the stir- 

 face of the earth, have neither corolla ner calycine wings, yet appear ta 

 ripen their seeds; the florets near the end of these racemes are always 



abortive. , , • i - 



If this plant is the P. Rubella of AVilld. witli which it appears very ac- 

 curately to atrree, it is verj widely extended over the United States,as Mr. 

 Nuttall found that species very abuadaiit in the pine forests around Lake 



JViichigun. 



Grows in light oak lands. 



Flowers from May to July. 



^^ 



Stem erectj simple; 



leaves lanceolate, a- 

 cute and acuminate; 



fill- 



4. Senega. 



P. caule ereeto,sim 



plici ; foliis lanceola 

 tis^acuminatisque; spi 

 ca terminali, filiformi. | spikes terminal, 



form 



Sp. pi. 3. p. 894. Walt. p. 178. Mkh. 2. p. 53. Pursh 2. p. 464. 



J?oof fibrous, perennial. Stem 8 — 14 inches high, slightly pubescent 

 fjeaves nearly sessile, lanceolate and ova;l, sometimes very wide, when fid 

 1y grown, generally acuminate. Flowers somewhat clustered in a ternu 

 nal spike, sessile, white. Seed hispid. 



Grows in the mountainous districts of Carolina, 



Flowers June 



August. 



5. VtRTlCILLATA. 



P. caule erecto, ra 

 moso : foliis verticil 



; spi 



9 



latis, Unearibus 



cis setaceis, peduncu 



latis 



3 



floribus 



dis 





Stem erect, branch 

 ing ; leaves verticil 



late, linear^ spikes ser- 

 taceous, pedunculate ; 

 flowers approximate 



i 



tincte alternis,approx- distinctly alternate 



imatis. 



Sp. pi. 3. p. 897. Mich. 2. p. 53. Pursh 2. p. 466. 



Stem 8 — 12 inches high, slightly angled- Leaves opposite, verlicillatet 

 sometimes soHtary, Hnear, acute, glabrous, finely serrulate. Bractea^ 

 -ptirplishj shorter than the calyx, deciduous. Calycine wings white, ting' 



^ with purple. Corolla nearly white, finibriate^witli two segments, p^^ 



w - 



