vian frontier. It is known vernacularly as cupu- rana or 
cupuassu- rana, an indication that the natives recognize 
the similarity of this bombacaceous tree to the related 
sterculiaceous Theobroma grandiflorum (Willd. ex 
Spreng. ) Schumann, the cupuassu of the Amazon Valley. 
The generic concept Patinoa is closely akin to Ma- 
tisia, from which it differs primarily in having seeds 
covered with a thick, lanate tomentum. This wool sur- 
rounding the seeds is very conspicuous in the new species 
described below. In fact, until the fruit was carefully 
examined, the collections from the type tree were ten- 
tatively assigned to the genus Quararibea or Matisia. 
Other significant and distinctive characters of Patinoa 
are found in the structure of the stigmas and the pollen 
grains. 
Patinoa ichthyotoxica PR. l. Schultes et Cuatreca- 
Sas Sp. NOV. 
Arbor mediocris usque ad 30 ped. alta, caudice erecto 
basim versus 25-40 em. in diametro, ramis subverticillatis, 
patulis vel decumbentibus, ramulis terminalibus glabris, 
cinereo-rugoso cum cortice, suberoso, foliorum cicatrici- 
bus magnis conspicuis, apicem versus subrubescentibus, 
foliis aliquid pendulis. Stipulae ovatae, acutae, brunneo- 
rufescentes, crassiusculae, usque ad 5 mm. longae, vix 
caducae. Folia simplicia integraque, valde coriacea; 
petiolus 2-3 cm. longus, subteres, subcrassus, apicem 
et basim versus etiam infra laminam saepe geniculatus, 
minutissime cinereo-lepidotus; lamina obovato-elliptica 
vel obovata, basi rotundata vel irregulariter subcordata, 
apice abrupte acuminata vel cuspidata, leviter marginata, 
plus minusve 20-86 cm. longa, 8-18 cm. lata, supra atro- 
viridia utrinque glabra et nitida, subtus pallidioria, ut 
videtur glabra sed copiosis minutissimis squamis incon- 
spicuis aspersis et sparis pilis stellatis circa 0.4 mm. ad 
/ 1380 | 
