OF ARTS AND SCIENCES: JUNE 14, 1S70. 251 



t. 1251. P. aristata, Michx. ; Lodd. Cab. t. 1731 ; Torr. Fl. N. Y. 2, 

 t. 80. — New Jersey to Saskatchawan, Florida, and Texas. Variable 

 in foliage, pubescence, &c. 



Var. detonsa : forma gracillima, sa?pius angustifolia, la?vis, corymbo 

 calyceque moilici? parurave pubescentibus. — P. aristata, Benth. pro 

 parte. — Florida, Alabama, Louisiana, Texas. 



7. P. amcexa, Sims. Pube molli rarius hirtella pi. m. villosa ; cau- 

 libus adscendentibus simplicibus (G — "15-pollicaribus) ; foliis erectiuscu- 



is oblongis lanceolatis seu lineari-lanceolatis acutiusculis obtusisve, 

 sum mis corymbum compactum bracteantibus ; ealycis dentibus anguste 

 subulatis acutissimis vix aristatis ; corolla? lobis obovatis integerrimis 

 raro emarginatis. — Bot. Mag. 1. 1308. P. pilosa, Walt., Michx. &c. 

 non L. P. pilosa ? var. Walteri, Gray, Man. ed. 2. P. Walteri, 

 Cliapm. Fl. p. 338. P. procumbens, Gray, Man. ed. 5, vix Lehm. 

 P. involucrata, Nutt. herb. — Barrens, dry bills, &c, Virginia and 

 Kentucky to Florida. Some forms nearly approach P. pilosa, with 

 which it has been confounded, especially when P. aristata has been 

 regarded as distinct. 



++ ++ Substolonifera?, e basi caules steriles reptantes vel decumbentes 

 proferentes : folia breviuscula lata. 



8. P. divaricata, L. ; Bot. Mag. t. 163. P. Canadensis, Sweet, Brit. 

 Fl. Gard. t. 221. Corolla? lobi obcordati vel cuneati emarginati, nunc, 

 in Var. Laphamii, Wood, integerrimi. P. glomerata, Nutt. herb. P. 

 glutinosa, Buckley in Sill. Journ. 45, p. 177, as to the specimens, 

 but the char. " flowers bright red or scarlet," must belong to some- 

 thing else, perhaps to some confusion of memory. 



9. P. reptans, Michx. ; Vent. Malm. t. 107. P. stolonifera, Sims, 

 Bot. Mag. t. 563 ; Sweet, Brit. Fl. Gard. n. ser. t. 293. Both names 

 date from the year 1803. P. crassi folia, Lodd. Bot. Cab. 1. 1596. As 

 Dr. Torrey has noted, this species has a long, often exserted style, the 

 preceding a very short one, — characters we may suspect to be related 

 to dimorphism ; but if so the counterpart form has not been observed. 



* * * Sparsiflorce, linearifolia?, bundles, diffusa? ; corolla? pallide 

 violacea? lobis cuneatis in segmenta angusta (linearia seu ob- 

 longa) bifidis. 



10. P. bifida, Beck. ; Gray, Man. Pubescens ; foliis nunc glabra- 

 tis ; corolla? lobis ultra vel ad medium usque in segmenta sublinearia 

 bifidis. — Prairies of Illinois and Missouri ; in spring. 



