position in the Mexican section of the Temperate House it 
has grown into a strong bush 8 ft. in height, and flowered 
for the first time in September 1913. As regards soil and 
temperature its requirements appear to be those of the 
familiar H. Rosa-sinensis, the Juva or ‘ Shoe-flower’’ of 
Indian gardens. The name /. Arnottianus, under which 
our plant was received from California, is that by which 
the species is usually known in collections. But that 
name unfortunately has from time to time been applied 
to three distinct plants, and when an effort is made to 
restrict its incidence to one of the three we find that it is 
not to the present species, but to a nearly allied one 
with red flowers that it must be limited. The most 
satisfactory solution of the difficulty, as Mr. Sprague has 
elsewhere pointed out, would be to abandon altogether the 
employment of the name /7/. Arnottianus. 
Description.—7ree up to 25 ft. high; twigs of the 
preceding season about } in. thick, bark usually grey, 
marked with very pronounced leaf-scars; young twigs 
dull purple and hairy, as are the petioles and pedicels. 
Leaves wide elliptic-ovate or suborbicular, obtuse or 
apiculate, base rounded or somewhat cordate, margin 
crenate or crenate-serrate, 34-8 in. long, 3-7 in. wide, 
almost glabrous above, puberulous beneath, veins purplish, 
raised beneath; petiole 13-4 in. long; stipules subulate, 
caducous. lowers solitary in the upper axils; pedicels 
14-2 in. long, slightly thickened upwards just under the 
calyx; involucral bracts 6-8, reflexed, linear-subulate, 
about 4 in. long. Calyx tubular, slightly enlarged 
upwards, split on one side above the middle, 14-14 in. 
long, shortly pubescent externally; lobes triangular, 
acuminate, about 4 in. long. Corolla white; limb 
spreading; segments about 44 in. long. Staminal tube 
over 6 in. long, papillate and towards the upper part red 
like the free filaments, which are irregularly whorled and 
are #-l in. in length. Ovary oblong, shortly pubescent. 
Style-arms 5, slightly diverging ; stigmas capitate. 
Fig. 1, calyx split open, showing ovary : 2, stellate hairs on pedicel ; 3, apex 
of staminal tube, with style-arms; 4, anther :—all enlarged. 
