318 H. Pittier. 
Differs from Q. turbinata Poir, to which it has been referred, by 
its short stipules, its narrow leaves, and the shape and size of the 
calyx. Placed side by side, the 2 species cannot be confused. 
Gyranthera Pittier gen. nov. Bombacacearum. 
Flores leviter zygomorphi. Calyx tubulosus plus minusve regulariter 
rumpens 2-lubiatus 4-pàrtitus. Petala basi subadnata. Tubus stamineus 
erectus, cylindricus; antherae fere sessiles, lineares, dorsifixae, ex parte 
quo parte quarta superiori tubi staminei spiraliter affixae; pollinis gra- 
nula pallide flava, diminuta. Pistillum 5-carpidiatum; ovarium 5-loculare 
superum; ovula oe, transversa, anatropa, angulo interno affixa; stilus 
simplex, stigmate breve 5-fido. Fructus? 
Arbor alta, inermis. Folia digitata, stipulata, foliolis integris. In- 
florescentia terminalis, unilateraliter panniculata. Flores speciosi, albi, 
ebracteati. 
Species unica in Isthmo panamense- invenitur. 
The floral features of this tree would perhaps place it among the 
Matisiae, while its digitate leaves would suggest Adansoniae. The pe- 
culiar arrangement of the stamens is difficult to describe from dry 
specimens, the only conspicuous character being the spiral or perhaps 
meandrous disposition of the anthers around the upper part of the 
staminal tube. Moreover the latter seems to end in 5 lobes, about 4 cm 
long, twisted also spirally and each bearing an anther of equal length; 
the cells of these anthers are divided into minute square chambers by 
transverse septa. In boiled specimens the whole staminal tube becomes 
englobed into a gelatinous, transparent mass, which forbids a close 
examination of the specimens. 
10. Gyranthera darienensis Pittier, spec. nov. 
Ramulis glabris; foliis glabris, 3—5-foliolatis, petiolo quam lamina 
foliolorum breviore vel paullum longiore, tereto ad basin paullum cras- 
siore; foliolis coriaceis petiolulatis ellipticis basi subrotundatis vel sub- 
acutis apice abrupte obtuse acuminatis; stipulis lanceolatis acutis deci- 
duis; pedunculis pedicellisque glabris verruculosis; calyce tubuloso 
crasso coriaceo, extus primum ferrugineo-pubescente demum glabres- 
cente, intus sericeo-villoso; corolla calyce plus quam dimidio breviore, 
bilabiato, labiis 2-lobulatis; petalis oblongo-laciniatis albis leviter pubes- 
centibus; tubo stamineo calyci duplo superante, antheris helicoideis 
quoadmodo ad partem quartam superioram eodem affixis, 5 terminalis 
exceptis; pistillo glabro quam petalis longiore, ovario subgloboso, 5-costato, 
minute ferrugineo-pubescenti. 
Arbor circa 25 m alta, trunco recto 0,4 m diametro, ligno albido. 
Petiolum 7—22 em longum, petioluli 0,8—1,6 c m longi; foliola 11—21 cm 
longa, 3,5—9 cm lata, venis subtus prominentioribus; stipulae ca. 2 cm 
longae. Pedunculi 50 cm longi, dichotomi; pedicelli 4—6 cm longi, 
0,5 cm diametro. Flos ca. 16 cm longa. Calyx 7 em longus, ca. 2 cm 
diametro. Petala 15 cm longa, 2 cm lata. Tubus stamineus 12,5 om 
longus, pars superiora 3 cm longa antheris 12 mm longis, fere sessili- 
