MOUNT RORAIMA IN BRITISH GUIANA. 33 
much shorter and stouter pedicels, and different indumentum. The indumentum which 
covers the whole of the inflorescence is rather peculiar, and is neither scurfy nor hairy, 
and when highly magnified seems to consist of a very thin dense covering of very 
minute, flattened, and very closely adpressed hairs, producing a greyish hue. 
This species and Sciadophyllum coriaceum differ from all the others in the genus in 
having the flowers collected into a compound umbel terminating a long peduncle, and not 
paniculate ; for although S. coriaceum has a second whorl of umbels below the terminal 
one, they all spring from one level, and the inflorescence cannot be called a panicle. 
The styles also of these two species are united in a column, and in this character, and 
indeed in their entire floral structure, they quite agree with Heptapleurum, a genus that 
is only artificially separated from Seiadophyllum by this one point, as has already been 
pointed out in Benth. & Hook. f. Genera Plantarum, i. pp. 940, 942. As there are 
some species of Heptaplewrum in which the styles are at first united in a column and 
during the growth of the young fruit become free, it appears to me that Seiadophyllum 
should include Heptapleurwm, when it would form a genus fairly uniform in character 
and of world-wide distribution within the tropics. 
RUBIACEÆ. 
HENRIQUEZIA JENMANI, K. Schum. in Mart. Fl. Bras. vi. pt. vr. p. 135. (Plate 4.) 
Mazaruni River, J/cConnell A: Quelch, 711; Jenman, 629. 
This handsome tree appears only to have been collected in this single locality. 
CHALEPOPHYLLUM SPECIOSUM, N. E. Brown, sp. n. (Plate 5, figs. 10-17.) Frutex 
glaber, ramis tetragonis. Folia opposita ad apicem ramorum subconferta, coriacea, 
sessilia, obovata, obtusa, subapiculata. Flores in axillis supremis (foliis delapsis) 
solitarii, breviter pedicellati, bibracteati. Calycis lobi æquales vel inæquales, 
lineares vel oblongi, acuti. Corolla hypocrateriformis, 5-lobata, tubo longissimo, 
lobis anguste lanceolatis vel oblongis acutis. Stamina inclusa. Stylus ssepius 
inclusus. 
A stoutly-branched shrub, glabrous in all parts excepting the inside of the corolla. 
Branches 4-angled, 2 lin. thick ; internodes very short, 13-5 lin. long. Leaves opposite, 
in a cluster of 3-5 pairs at the tips of the branches, subsessile, 11-2 in. long, 1-1 in. long, 
more or less obovate, obtuse, bluntly apiculate, cuneate at the base, rigidly coriaceous in 
the dried state, shining above, pale beneath, slightly revolute along the margins; midrib 
stout and conspicuous beneath; veins inconspicuous or not at all visible. Stipules 
broad-based, abruptly contracted into a linear point about 14 lin. long, persistent long 
after the leaves have fallen. Flowers usually 2 to each shoot, or sometimes 1 only, 
arising immediately below the terminal tuft of leaves in the axils of fallen leaves or in 
those of the lowest pair, solitary in each axil. Pedicels 1-4 lin. long, stout, flattened, 
bibracteate at the base of the ovary. Bracts 4-8 lin. long, 11-5 lin. broad, of the 
form and substance of reduced leaves. Calyx-lobes 5-10 lin. long, 1-23 lin. broad, 
equal or unequal, varying from linear to oblong, acute, erect, coriaceous. Corolla 
very variable in size, hypocrateriform, regular, 5-lobed; tube 13-33 in. long, about 13 lin. 
SECOND SERIES.—BOTANY, VOL. VI. F 
