6 
a Rhizophora wade var. racemosa but without discussing its 
peculiarities beyond the statement that its inflorescence is 
repeatedly a Cething Oliver remarks that R. racemosa ‘* occurs 
also in Tropical America, if this identification is correct’’.* It 
must be noted that Oliver describes . racemosa as “‘a ‘small 
tree’’, whereas in British Guiana, so far as I have seen, it is 
the largest of the three species I have noted. In British Guiana 
it is certainly a larger plant, in every’ way, than &. Mangle, 
which is described by Jacquin as attaining a height of ‘ 
quagintapedalem plerumque ’ 
As Dr. Stapf very justly points out, it is not possible to decide 
the identity of my Form ii. with Meyer’ s racemosa until we are 
in a position to compare Meyer’s orginal specimen of this species. 
It seems advisable, then, for the present to refer my Form iii. 
tentatively to Rhizophora racemosa, and to regard my Form ii. 
ew species, for whi ch I propose the name Rhizophora 
Harrisoni.t 
I suggest the following diagnosis of my Form iit. 
_ Rhizophora racemosa, G. FY. W. Meyer (descr. emend.); a 
k. Mangle, Dis inflorescentia dichotomo-paniculata, a a R. Harri- 
sonit, Leechm 2 See” crassissimo et radicula longissima 
ad 65 em. oes distinc 
rbor magna, ad ae m. alta, radicibus aeriis a ramis 
superioribus descendentibus. Folia 10-12 em. longa, 4-5 cm. 
ata, supra saturate virentia, —t, punctis nigricantibus 
adspersa. Petioli crassi, 1-5-3 longi. mi et ramuli 
inflorescentiae crassi, joke teil ickes-sbeddacull plus 
in 3 em. articuli 10-5 longi—in utraque dichotomia 
° -margine calyciformi sexdentato enati. 
issima, qui s vel sexies repetito-dichotoma, articulata, 
mations, ‘Mabastra pallide flavo-viridia, ovata vel elliptica, 
10-12 x 6-7 Calye viridis vel externe pallide flavescens, 
profunde anys artitus persistens, segmentis crassis ovato- 
lanceolatis subacuminatis coriaceis 10-12 x 6-7 mm. leviter 
patentibus. Petala 4, candida, linearia, Se margine 
obsolete hirsuta, inter lacinias calycis v 
Antherae saepe 
corolla paulo 
breviores, caducae. Suyhis: fortiter sulcatus; stigmata 2-3, 
rarius 4. Pericarpium 4-5 cm. longum, 2 em. atum, ovatum, 
crassum, scabriusculum, aliquando obsolete maculatum, saepe 
eurvatum. adicula omnium longissima, ad 65 cm. longa, 
pallide viridis, saepe curvata, apicem versus ferruginescens 
et sensim saepe ad 1°5 cm. incrassata. 
This aon abpent? to be the prevailing rive 
Bartica 
mangrove ae 
, and at 
iles up the Essequibo River, cd is the dominant 
* “Flora of Tropical sree vol. ii, p. 408. 
+ In honour of Professor J. B. is C.M.G., M.A., Director of 
and Agriculture in British Guia: - rector of Science 
