296 
CONTRIBUTIONS TO BOTANY. 
they are sufficiently distinct from all others of the Colletiem, 
especially from Trevoa, with which it has been confounded. It 
was originally proposed by me, in 1825, for the plant M’hich I 
called Talguenea costata, after its vernacular name of Talguen ; 
but Sir Wm. Hooker, in 1830, who had not then seen the fruit 
of Trevoa, considered it to be congeneric with the latter genus ; 
and, on the authority of Dr. Gillies, he suppressed Talguenea, 
and placed the two typical plants as distinct species of Trevoa 
(Bot. Misc. i. 158). The former celebrated botanist, in 1833, 
having then seen the fruit of Trevoa, was induced to suppress 
that genus, and to refer T. trinervis to Retamilia ; and at the same 
time (Bot. Misc. iii. 174) he first adopted the genus Talguenea 
as I had originally proposed it. It is strange that Dr. Gillies 
should have confounded two plants so totally distinct, as not only 
had he ample opportunity, while he resided with me at Concon, 
of examining them in the living state, but he also saw my draw- 
ings, in which their characters are fully shown. Colla, claiming 
the authority of Bertero, referred both Talguenea and Trevoa 
to Colletia (Mem. Torin. 37. p. 53). The prominent charac- 
teristic of Talguenea lies in the structure of its fruit, which con- 
sists of an indehiscent membranaceous carcerule, surmounted 
by its enlarged persistent style, of nearly equal length, and en- 
closed in its entire and unchanged calyx, which is perfectly free 
from it, and about three-quarters of its length. The ovary is 
always 3-locular, each cell having a single erect ovule, but of 
these seldom more than one is perfected ; the fruit, however, is 
occasionally 2-locular, or more rarely 3-celled. Among other 
peculiarities, we see in all the axils of Talguenea a very large 
squamose tubercle growing beneath the spines, from which issue 
many crowded fasciculated leaves and flowers ; whereas in Tre- 
voa, as before shown, this tubercle becomes extended into an 
elongated branchlet, on which the leaves are distributed in pairs, 
by distinct intervals, and towards the extremity become abor- 
tive, when the flowers assume a spicated or racemose appear- 
ance. 1 have defined its generic features in the following 
manner : — 
Talguenea, nob. — Calyx petaloideus, turbinato-tubulosus, 
membranaceus, 10-uervis, fere ad medium 5-fidus, laciniis 
oblongis, acutis, 3-nervatis, apice callosis, aestivatione valvatis, 
demum reflexis, tubo intus piloso, persistens, immutatus et 
marcescens. Petala 5, erecta, laciniis sequilonga et alterna, 
rotundato-oblonga, concava, subcucullata, unguiculata. Sta- 
mina 5, petalis inclusa et cum unguibus inserta ; filamenta 
tenuia, pilosa, complanata, medio carinata, margine membra- 
nacea et ciliata, apice repente inflexa; anthera parvse, reni- 
