STUDIES IN .THE GENUS BIDENS. IV 
CONTRIBUTIONS FROM THE HULL BOTANICAL LABORATORY 232 
EARL E. SHERFF 
(WITH PLATES IX AND x) 
Bidens mollifolia, sp. nov.—Herba annua, 1.2-1.8 m. alta 
(ex inscriptione Pringlei); caule et ramis plus minusve acute 
tetragonis, subviridibus aut purpurascentibus, dense tomentosis 
(aut supra etiam fere glabris); ramis ad finem liberum in aliquot 
_ ramulos aut pedunculos divisis, ut quaeque planta 30-60 capitula 
_ habeat. Folia opposita, petiolata, petiolo adjecto 2-9 cm. longa, 
ternata aut pinnata, dense et molliter pilosiuscula aut tomentosula, 
infra pallidiora; foliolis (3-7) ovatis aut lanceolatis, serratis, — 
lateralibus (infimis interdum ternatis) 1-3.5 cm. longis et o.5-2 
cm. latis, terminali 1.8-5 cm. longo et 0.7-2. 3 cm. lato; petiolis 
_ dense tomentosis, basi connatis, o.3-2. 5 cm. longis. Capitula 
breviter pedunculata pedunculis o.5—3 cm. longis, ligulata, 5-7 
mm. ee 
lata. Involucrum basi hispidum, squamis duplici serie di | 
exterioribus (6-8) linearibus, ad. apicem obtusis, m hispidis 
et sone minusve ciliatis, 2-3 mm. longis; ein § anceolatis, 
aximam partem glabris, margine diaphanis, 3-5 mm. ory a. 
igulae (circ. 5) obovatae aut oblanceolatae, r cuneate 3-7-striatae, a 
oo apice aloe sinned subrotundis, oO. 8-1 ¢ cm. lor ga - a8 | Pelese a 
2 argine diz jana nm. on 
- mm. "jonga. : oe 
: OC. G. erie’ 6050, at altitade of ee a oi Sec 
A 165% 4 (type in | Herb. Gray); E. W. . 
