380 MR. F. N. WILLIAMS: REVISION 
scabriuscula. Pedicelli filiformes patentes dense puberuli, 
fructiferi apiee sursum eurvati. Sepala ovato-oblonga acuminata 
carinata, carina viridi pilis brevibus scabriusculà, margine 
interdum ciliato late scariosa. Petala alba oblonga obtusa, e 
calyce exserta. Ovarium subglobosum, in ipso flore jam per 
valvas dehiscens. Capsula ovato-oblonga. Semina sphieroideo- 
lentieularia. 
Planta a precedenti specifice distincta charactere cardinali 
petalorum longitudinis, ac in multis notis. 
a. genuina, Williams. 
Syn. A. lanuginosa var. 0. megalantha, Rohrb. in Linnea, xxxvii. p. 264 
(1871-72). 
A, alsinoides var. ovatifolia, J. D. Smith in Bot. Gazette, 1893, 
p. 198. 
Caules plus minus dense pubescentes vel glabrescentes. Folia 
late ovata, aut punctulata et margine tantum ciliata aut dense 
pubescentia, 8-12 mm. lg., 6-12 mm. lt. Petala calyce sesqui- 
longiora. 
p. ensifolia, Williams. 
SYN. A. lanuginosa, var. y. ensifolia, Rohrb. 1. c. 
Caules laxi pilis paucis adspersi. Folia anguste linearia et 
subulata, nervo centrali subtus valde prominente, 20 mm. lg. 
approxim. 1-1 mm. lt. Petala e calyce exserta. 
Lusus 1 :—Folia subtus pilis paucis adspersa, ceterüm glabres- 
centia. 
Lusus 2 :—Folia utrinque dense hirsuta. 
y. tucumanensis, Williams. 
Syn. A. diffusa, var. tucumanensis, Griseb. in Gótting. Abhandl. 
xxiv, p. 27 (1879). 
Folia elliptica vel elliptico-oblonga, mucronulata. 
I think that varr. y and 8 of A. lanuginosa, Rohrb., shouid fo n 
a distinct species. The petals are exserted from the calyx ui 
the case in var. tucumanensis (of which there are specimens ® 
Herb. Kew.) and there are other distinctive characters. The 
species is limited to S. Mexico and N. Argentina. Like A. d 
palensis it is found clambering 9-15 decim. among bushes an 
shrubs (vide Pringle, Pl. Mexican. 1894, no. 4641). ; 
Geogr. limits.—2N. Mexico : Mt. Orizaba in prov. of Vera Cru 
(var. B). 
S. 4 E. Argentina: prov. of Tucuman (var. y) , 
W. Mexico; Chinautla in prov. of Puebla (var. p. 
rm 
