28 REPORT ON TWO BOTANICAL COLLECTIONS FROM 
as shown in figs. 6-7, but I cannot consider this variation of sufficient importance to 
separate the two specifically. 
Allied to Macairea thyrsiflora, DC., and M. albiflora, Cogn.; differing in the very 
much rougher upper surface and different indumentum of the lower surface of the leaves 
and in the stouter anthers. M. albiflora, Cogn., according to Spruce’s label, has purple 
flowers, not white as described by Cogniaux. 
MACAIREA PACHYPHYLLA, Benth. in Hook. Journ. Bot. ii. (1840), p. 292; R. Schomb. 
Reisen in Brit.-Guiana, iii. pp. 1100, 1192; Cogn. in DC. Monog. Phan. vii. 
p. 178. 
Kotinga Valley, MeConnell & Quelch, 181.—Apparently endemic to the vicinity 
of Roraima. 
TIBOUCHINA FRATERNA, N. E. Brown, sp. n. Folia anguste elliptica, utrinque vequaliter 
subaeuta, 3-nervia, subtus appresse squamosa, supra striolata, et marginibus et 
secundum lineas duas inter nervos squamosa. Bractez liberæ, oblongz, obtuse. 
Calyx appresse squamosus, 5-lobus, tubo cylindrico quam lobis longiore. Petala 
elliptieo-obovata, unguiculata, glanduloso-ciliata. 
Branchlets densely clothed with imbricating, lanceolate, acuminate, brownish scales 
about à lin. long, those at the nodes about twice as long and more acuminate. Leaves 
spreading; petiole 1-13 lin. long, scaly; blade j-1 in. long, 4-6 lin. broad, narrowly 
elliptic, about equally acute or subacute at both ends, apiculate, 3-nerved, the underside 
clothed with adpressed acuminate scales, those on the nerves much larger than the rest, 
the upper surface finely striate, with a longitudinal row of minute scales near each of the 
lateral nerves and along the margins. Cymules 2-3-flowered, subsessile or with peduncles 
up to 34 lin. long, axillary and terminal, forming a terminal inflorescence 1-2 in, long, 1 in. 
broad, clothed to the tips of the calyx-lobes with pale, rosy-tinted acuminate scales. Bracts 
free, 2-4 lin. long, about 13 lin. broad, oblong, obtuse, resembling reduced leaves; bracteoles 
smaller, thinner, more glabrous, free, ciliate with long hair-like scales. Pedicels very short, 
scarcely 1 lin. long. Calyx-tube 3 lin. long and about 14 lin. diam., cylindric-campanu- 
late; lobes 2 lin. long, 17 lin. broad at the base, whence they gradually taper in a nearly 
straight line to an acute point, erect or very slightly spreading, glabrous inside, ciliate. 
Petals 7 lin. long, 33 lin. broad, elliptic-obovate, very obtuse, clawed, minutely ciliate 
with gland-tipped hairs, and with a few long simple hairs at the apex, otherwise glabrous, 
Stamens 10, unequal, glabrous ; the longer anthers 5 lin. long, the shorter 4 lin. long, all 
attenuate to a subulate point, opening by one terminal pore; connective bifid at its 
insertion on the filament. Ovary free, oblong, densely covered with hair-like scales; 
style slender, glabrous. 
Upper slopes of Mount Roraima, MeConnell & Quelch, 17. 
A very distinct species, which, according to the arrangement of Cogniaux, I think 
should be placed in the section Lepidote, although it bears very little resemblance to the 
only two species (T. lepidota, Baill., and T. paleacea, Cogn.) at present placed under that 
section. It has much more resemblance to T. Spruceana, Cogn., and T. aspera, Aubl., 
