MOUNT KORAIMA IX BRITISH GUIANA. :;.'} 



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 bairy, 

 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 Sciadophyllwm coriaceum differ from all the others in the genus in 

 having the Mowers 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 Sciadophyllum by this one point, as has already been 

 pointed out in Benth. & Hook. f. Genera Plantaruru, i. pp. 910, 912. As there are 

 some species of Heptapleurum 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 Stiadophylluvn 

 should include Heptapleurum, when it would form a genus fairly uniform in character 

 and of world-wide distribution within the tropics. 



RUBIACE/E. 



Henkiquezia Jexmam, K. Sebum, in Mart. Fl. Bras. vi. pt. vi. p. 135. (Plate 4.) 

 Mazaruni River, McConnell 8f Quelch, 711; Jenman, 629. 

 This handsome ti-ee appears only to have been collected in this single locality. 



Chalepopiiyi.mjm 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 sequales vel inrequales, 



lineares vel oblongi, acuti. Corolla hypocrateriforniis, 5-lobata, tubo lomnssimo, 



lobis anguste lanceolatis vel oblongis acutis. Stamina inclusa. Stylus saspius 



inclusus. 



A stoutly-branched shrub, glabrous in all parts excepting the inside of the corolla. 



Branches 1-angled, 2 lin. thick ; internodes very short, 1^-5 lin. long. Leaves opposite, 



in a cluster of 3-5 pairs at the tips of the branches, subsessile, 1|— 2 in. long, f-1 in. lon°-, 



more or less obovate, obtuse, bluntly apiculate, cuneate at the base, rigidly coriaceous in 



the dried state, shining tibove, 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 H lin. long, persistent lon°- 



after the leaves have fallen. Flowers usually 2 to each shoot, or sometimes 1 onlv, 



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 1-1 lin. long, stout, flattened, 



bibracteate at the base of the ovary. Bracts 4-8 lin. long, H-5 lin. broad, of the 



form and substance of reduced leaves. Calyx-lobes 5-10 lin. long, 1-2 £ lin. broad 



equal or unequal, varying from linear to oblong, acute, erect, coriaceous. Corolla 



very variable in size, hypocrateriform, regular, 5-lobed ; tube lf-3^ in. long, about If lin. 



SECOND SERIES. — BOTANY, VOL. VI. p 



