MOUNT ROK.ATMA IN BEITISH GUIANA. 35 



anthers linear. Glands of the disk 1, in 2 opposite pairs, the larger pair partly enclosing 

 the smaller pair. Ovary inferior, laterally compressed, 2-celled , style included, filiform ; 

 stigma of 2 short oblong lobes ; placenta ascending from near the base of the septum, 

 thin ; ovules numerous, flat. 



On the Etoraima Range at 3500 It., McCotmell 8f Quelch, 71 I ; Kaieteur Falls on the 

 Potaro River, Jenman, 7102. 



This is one of the most remarkable plants in the collection ; its alternate leaves and 

 general habit give it the appearance of a Gesneraceous rather than of a Rubiaccous 

 plant. The two large bracts enclosing the flowers and the bilobed corolla-lobes are 

 very remarkable characteristics. It is very closely allied to IHdymochlamys While/, 

 Hook, f., from New Granada, the only other known species, but differs in its much smaller 

 leaves and very much longer corolla-lobules. In I). Whitei the leaves are lf-3 1 , in. 

 long, 4-11 lin. broad, and taper at the apex into a long acuminate point, and the 

 subquadrate lobules of the corolla are only about \ a line long and the same in breadth. 



To the generic characters of BidymocMamys may be added the following description 

 of the fruit, taken from a specimen of D. Whitei sent to Kew by Mr. R. B. White in 

 1882 : — Fruit a laterally-compressed 2-celled capsule, dehiscing at the apex between the 

 glands ; placentas ascending from near the base of the septum, thin ; seeds numerous, 

 minute, ovate, flattened, thinly covered with rather long hairs, with a dense tuft at the 

 narrower (micropyle ?) end ; testa rather coriaceous, moderately thin ; albumen copious, 

 oily ; embryo minute. 



The two smaller glands of the disk in the fruiting stage of D. Whitei are a little 

 longer than the larger glands, they are tubular in the upper part and may assist in the 

 dispersion of the seeds. 



Tocoyexa neglecta, N. E. Brown, sp. n. Folia breviter petiolata, lanceolata vel 

 elliptico-lanceolata, acuta, basi cuneata, supra pubescentia, subtus tomentosa. 

 Cyniae terminales, subsessiles, 9-20-florse. Calyx acute 5-dentatus, plus minusve 

 tomentosus. Corolhe tubus 3-3J poll, longus, extra tomentosus, intra glaber, 

 fauce hirtus ; lobi oblique oblongo-lanceolati, subacuti, glabri, ciliati. 

 Branches subterete or obscurely 1-angled, with a light brown bark, tomentose when 

 young. Leaves opposite, 3-7 in. long, lf-3A in. broad, lanceolate, elliptic-lanceolate or 

 slightly obovatc, acute, cuneately tapering at the base into a petiole 1^-3 lin. lon°-, 

 somewhat harshly pubescent above, densely tomentose beneath, with the hairs alon"' the 

 veins distinctly diverging on either side ; primary veins 9-13 on each side of the midrib, 

 and together with the reticulated veinlets impressed above, prominent beneath. Stipules 

 about 2 lin. long, triangular, acute, at first tomentose, becoming glabrous with age. 

 Cymes terminal, subsessile, about 9-20-flowered. Flowers sessile. Calyx more or less 

 tomentose; the tube H-2^ lin. long, oblong, slightly tapering downwards; the limb cup- 

 shaped, with 5 deltoid acuminate teeth f-2 lin. long. Corolla hypocraterii'orm, 5-lobed 

 white; the tube 3-3^ in. long, about H lin. diam., slightly enlarged at the mouth, 

 tomentose outside, glabrous within, except in the throat, which is densely hairy ; the 



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