OF THE MATTO GROSSO EXPEDITION, 1891-92. 335 
Hab. Legi in ripá R. Paraguay juxta Santa Cruz, ubi mens. Oct. floret et fructificat. 
(N. 461.) 
Frutex elatus. Foliorum lamina usque ad 30-0 em. long. et 7:0 em. lat. (mediocris 22:0 x 
6:0 em.), utrinque pallide nitens, subtus vero decolor, in sieco lutescenti-brunea, siepe 
plus minus, more Erythroxyli Coca, Lam., et specierum Zriplaridis, longitrorsum 
striata; petioli crassi, alte canaliculati, 0:6-0'9 cm. long. 0:25 em. lat, dorso 
transverse rugosi. Paniculee thyrsoidew, usque 12:0 em. long., basi plerumque 
40-770 em. lat., ramulis plerisque 2:0-5:0 em. long., plurifloris; pedicelli graciles, 
circa 0'4 em. long. Alabastra paullulum ante floritionem 0:5 em. long., 0:4 em. lat. 
Sepala 0:5 em. long., juxta medium 0:2 em. lat., margine breviter scariosa. Petala 
0*6 cm. long., usque 0:5 em. lat. Anthere 0°5 em. long., apieulo in sicco flave- 
scente, ceterum brunes. Gynophorum 0:05 cm. long. Ovarium 0:06 em. long., 
stylo 0-4 cm. long. coronatum. Gynophorum fructiferum subeylindricum, admo- 
dum curvatum, 0:5 em. long. et 0:3 cm. diam. Drupz 1:0 em. long. vel paullulum 
ultra, 0:6 cm. lat., lzeves. 
Mihi videtur Ouratee tenuifolie, Engl., proxima, abs quá foliis longe aliis, alabastris 
majoribus, petalis latioribus, antheris longioribus inter alia optime abhorret. 
This species is remarkably homoplastie with the Amazonian 0. verruculosa, Engl., so 
much so that it would be difficult to distinguish the two without flowers. In the 
flowering state, however, there is much difference. A precisely similar homoplasy will 
be mentioned when treating of the genus Psychotria (see p. 379).  [Amazonia.] 
MELIACEA. 
GUAREA SYLVESTRIS (sp. nov.) ; foliis longiuscule petiolatis, 3-5-jugis, foliolis oppositis, 
petiolulatis, oblongis vel oblongo-lanceolatis, cuspidato-acuminatis, basi acutis, supra 
elaberrimis, subtus, costis appresse pubescentibus, mox minute puberulis exceptis, 
elabris; petiolulis una cum rhachi tomentosis, cito puberulis; paniculis brevipedun- 
culatis, simplicibus, quam folia multo brevioribus ; alabastris late oblongis; floribus 
tetrameris, calycis cupuliformis extus puberuli vel pubescentis ore impariter 
4-dentato; petalis breviter sericeo-tomentosis, in sicco haud rubescentibus; tubo 
stamineo cylindrico, crenellato; ovario subgloboso, gynophoro «equilongo, dense 
albido-sericeo. 
Hab. Crescit in sylvà primeeva inter Santa Cruz et Tapirapuan. (N. 400.) 
Arbuscula (ex schedis meis), forsan potius frutex altus trimetralis, trunco gracili. 
Ramuli cinerascentes, juveniles griseo-tomentosi, dein puberuli, crebre striati, 
0:4 em. diam. Foliorum rhachis 24:0 cm. long. Foliolorum juga insequalia, foliola 
basalia 7:0-11:0 em. long., superiora 15:0-18:0 em. long., 4:2-5'0 cm. lat., cre- 
berrime ac minutissime pellucido-punctata, coriaceo-membranacea; coste se- 
cundarie utrinque circa 10, angulis latis inserts, aperte arcuate, dein margini 
parallele, una cum costa medià subtus prominule ; venule arcte reticulat:e, 
utrinque, presertim vero subtus, conspicuæ. Petioluli incrassati, rugati, 0°5 cm. 
long.  Petioli 0'7-0-9 cm. long., superne late canaliculati. Paniculæ 7:0-12:0 
