OF THE MATTO GROSSO EXPEDITION, 1891-92. 303 
walls, in which are immersed numerous sclerenchyme-cells of a yellowish colour; this 
tissue is traversed by the exceedingly slender vascular bundle. Outside this come two 
layers of larger cells with light brown walls, and of these the outer abuts on the delicate 
epiderm. At each end of these two masses of light brown cells is a group of colourless 
cells with somewhat thickened walls. The exothecium and endothecium are both normal, 
and, even in the case of anthers from dried flowers, which are all that I have been able to 
examine, remains of the more or less disorganized tapetum can be made out. 
As has already been explained, the anther is multitubular, with loculi arranged one 
beneath the other in linear series to the number of about fifteen (figs. 8 & 9). Between 
each pair of loculi is interposed a delicate septum, of which the structure is difficult to 
make out from dried anthers; each in surface view is seen to be composed of exceedingly 
thin-walled cells, decreasing in size from periphery to centre. When the development of 
these anthers comes to be worked out, I suppose it will be found that the archesporial 
cells, instead of forming a continuous series, are interrupted by thin strips of indifferent 
tissue. The anther-cells open in the usual way, beginning from above downward, and it 
would appear that the septa are ruptured during the process; at any rate, in anthers 
from which the pollen has fallen I could see no trace of septa. With the exception of 
Hornschuchia, I know of no anthers with these serial loculi; they recall to a very slight 
extent the anthers of the Mimosez. 
ROLLINIA INCURVA (sp. nov.); foliis brevipetiolatis, lanceolatis vel lanceolato-oblongis, 
obtusis, basirotundatis, coriaceis, supra nitidis velnitidulis, glabris, subtus pallidioribus, 
minute puberulis; costis secundariis utrinque circa 12, angulis latis insertis, sub 
margine undulatim et fornicatim conjunctis; pedunculis solitariis bigeminisve, 
petiolos excedentibus, basi bracteatis, et juxta vel supra, nonnunquam vero infra 
medium bracteolá parvá onustis, puberulis ; floribus modicis, calyce ferrugineo- 
pubescente, corollz arcte ferrugineo-tomentose alis spathulato-oblongis ascendenti- 
incurvis; fructu ignoto. 
Hab. Crescit in sylvestribus ad Santa Cruz, ubi mens. Nov. floret. (N. 522.) 
Frutex diffusus longiramosus, vix usque trimetralis. Ramuli teretes, purpurascentes 
vel purpureo-grisei, leviter undulati, creberrime longitrorsum rimati, juveniles 
puberuli. Foliorum lamina plerumque 10-0-14°0 cm. long. et 3:5-45 em. lat., 
deorsum parum obliqua; costa media supra impressa, subtus admodum eminens; 
costs secundarise utrinque prominule; venule arcte reticulate, supra maxime 
aspectabiles; petioli 0:S-1:0 cm. long. supra anguste canalieulati, puberuli. 
Pedunculi usque 3:0 em. long. superne ampliati. Bractex bracteolseque ovate, 
acutze, extus ferrugineo-tomentelle, circa 0'15-0'2 cm. long. Flores lutescenti- 
virides. Calycis lobi abbreviati, rotundati, carnosuli, concavi, dorso carinati, 
0:25 em. long. Corollse basi 0°7 cm. diam., ale usque 1:5 em. long., superne 
0:65 cm. lat. Antherz 0:1 cm. long. Torus stamineus 0-2 cm. alt, 0:25 em. 
diam., pubescens. Carpella albo-sericea, 0°15 cm. long. : 
Ex affinitate R. orthopetale, A. DC., arbor cujus folia diversiformia, et petala majora 
una cum calyce canescenti-tomentosa. [Amazonia, Guiana.] 
