164 REPORT ON THE PLANTS 
only differing, indeed, in the absence of the long spreading hairs on 
the branches and panicle of that species or variety. 
The Sterculiacee (including Buetineriaceæ) comprise—Helicteres 
pentandra, L., from Santarem, precisely similar to Hostmann’s Surinam 
specimens ; male specimens of Sterculia striata, St. Hil. et Naud., from 
Santarem ; the Cacao-rana mentioned in Spruce’s letters (vol. ii. p. 198), 
from the forests near Obidos, a slender tree of forty or fifty feet, 
bearing its flowers on the naked stem and leaves at the summit only, 
apparently the Theobroma subincanum, Mart. ; Buettneria divaricata, 
Benth., from the borders of Lake Quiriquiry, and B. scabra, Aubl., 
from Santarem, both'of them Guiana plants ; two new species of 
Buettneria, described below ; Guazuma ulmifolia, L. ; a variety of the 
common Wallheria Americana, with the carpels usually more than one ; 
Melochia hirsuta, Cav., from which M. vestita, Benth., and M. clinopo- 
difolia, St. Hil. et Naud., are perhaps not really distinct; a large- 
leaved variety of M. arenosa, Benth., to which should apparently be 
referred the M. cinerascens, St. Hil. et Naud. ; and a variety of M. me- 
- dissæfolia, Benth., with smaller leaves, flowers, and fruits. In my 
description of the latter species (Hook. Journ. Bot. vol. iv. p. 130), by 
some error of the press or of copying, the seeds are said to be hispid, 
which has misled others, who have subsequently found the plant in 
- other localities. The seeds are perfectly without hairs, and the manu- : 
script notes being long since destroyed, I cannot now make out what 
was the word which has been so misread. Miquel’s Melochia concinna 
is, however, distinct in other respects from M. melissefolia, although it 
comes very near to the smoother forms of M. hirsuta. ; 
The following are the new species :— 
1. Buettneria rhamnifolia, sp. n. ; glabriuscula, caule fruticoso aculeato 
(scandente?), foliis oblongis obtusiusculis basi rotundatis subtus ad 
axillas nervorum barbatis, pedunculis axillaribus umbelliferis tenui- 
bus.—Affinis C. tereticauli, Lam., sed folia non acuminata, pedun- 
culi longiores, flores majores, etc. Ramuli teretes, flexuosi, novelli 
minute puberuli. Aculei pauci, recurvi. Folia breviter petiolata, 
subtripollicaria, glabra, utrinque viridia, a basi penninervia, glandula 
costo majuscula. Pedunculi in axillis foliorum novellorum solitarii 
V. ad basin ramulorum complures, tenues, glabri, infra umbellam 
semipollicares. Pedicelli capillares, pedicello æquilongi. Calycis 
lacinie 2 lin, longæ, basi late, acuminato-acutæ, tomento minuto 
