22 Contributions from the Gray Herbarium 
Mem. Wern. Soe. v. pt. 2, 550 (1826); DC. Prod. vi. 184 (1837),. 
as Helichrysum.— Gnaphalium lavandulaefolium of Willdenow 
now being universally referred to Elichrysum, the name Gnapha- 
lium lavandulaefolium, based on Elichrysum lavandulaefolium 
HBK., must according to the International Rules be taken up for 
the species which has been passing as G. lavandulaceum. It is now | 
known from Mt. Orizaba (Galeotti, Liebmann 307, Rose & Hay 
5762) and Costa Rica (Oersted 278, Pittier & Durand 3430). The 
two names the species has borne in the genus Chionolaena, while 
only of synonymic interest, serve to emphasize the uncertainty 
and undesirability of further burdening synonymy by publishing 
as of “ Bentham & Hooker ”’ combinations made only inferentially 
in their Genera Plantarum. 
APLOPAPPUS PHYLLOCEPHALUS DC. Prod. v. 347 (1836). — A. 
rubiginosus T. & G. var. phyllocephalus (DC.) Gray, Syn. Fl. i. pt. 
2, 130 (1884). Aster phyllocephalus (DC.) Ktze. Rev. i. 316 (1891). 
Eriocarpum phyllocephalum (DC.) Greene, Erythea iii. 15 (1895). 
E. rubiginosum phyllocephalum (DC.) Heller, Contr. Herb. Frank- 
lin & Marshall Coll. no. 1, 101 (1895.) EH. megacephalum Nash! 
Bull. Torr. Club xxiii. 107 (1906). 
Two varieties are recognizable, var. genuinus (A. phyllocephalus 
DC. 1. ¢.), to which the above synonymy appertains, and 
A. PHYLLOCEPHALUS DC. var. rubiginosus (T. & G.), comb. nov. 
—A. rubiginosus T. & G.! Fl. N. Am. ii. 240 (1842). Eriocarpum 
rubiginosum (T. & G.) Britton, Mem. Torr. Club v. 316 (1894); 
Greene, Erythea iii. 15 (1895). Sideranthus rubiginosus (T. & G.) 
Britton in Rydb. Bull. Torr. Club xxvii. 621 (1900). — The two 
varieties above named, although appearing very different in their 
extremes, seem so completely connected by intergradient specimens 
that they can not be specifically separated. 
APLOPAPPUS SPINULOSUs (Pursh) DC. The problem of the inter- 
pretation of this polymorphous species would seem to be simplified 
by the recognition of several well-marked varieties of rather defi- 
nite geographical range, as follows. 
_ A. SPINULOSUS var. genuinus. Planta plus minusve tomentoso- 
lanata. Folia inferiora bi-subtripinnatifida, superiora pinnatifida 
segmentis linearibus latitudinem laminae multo superantibus. 
Involucrum plus minusve dense canescenterque lanato-tomento- 
so-pilosum, phyllariis haud vel non conspicuiter glandulosis. — 
