IX, C, 2 
Merrill: The Plants of G‘-am 
155 
WEDELIA CANESCENS (Gaudich.) comb. nov. 
Verbesina canescens Gaudich. Bot. Freyc. Voy. (1826) 463. 
Wedelia chamissonis Less, in Linnaea 6 (1831) 161. 
Wollastonia canescens DC. Prodr. 5 (1836) 547. 
Stemmodontia canescens W. F. Wight ex Safford in Contr. U. S. Nat. 
Herb. 9 (1905) 377, pi. 65. 
McGregor 50b, G. E. S. U56. 
A species manifestly allied to Wedelia biflora DC., but much more pubes- 
cent. Known only from Guam, but with a closely allied form in Samoa 
( Vaupel 96). Possibly the form that has been credited to Guam as W. 
biflora DC. 
WEDELIA ARGENTEA (Gaudich.) comb. nov. 
Verbesina argentea Gaudich. Bot. Freyc. Voy. (1826) 463; Safford 395, 
G. E. S. 351, March, 1912. 
This species is closely allied to the preceding, but is probably specifically 
distinct. Dr. F. Gagnepain has kindly looked up Gaudichaud’s type speci- 
mens in the Paris Museum of Natural History and states that while the 
two species are allied they are probably distinct. He states that Verbesina 
canescens has its leaves covered with appressed hairs but the hairs suffi- 
ciently distant so that the surface of the leaf can be seen, while V. argentea 
has much more numerous hairs that entirely cover the surface; that in 
V. canescens the teeth of the leaves are larger, more sharply pointed, and 
the petioles much longer and more slender than in V. argentea which has 
small teeth, and short petioles. Abundant material from Guam may show 
intermediate characters, but so far as our material goes two closely allied 
species appear to be represented. The type was from Guam and the species 
is known only from that Island. 
