ROWI.RR: SYNOPSIS OF THE GENUS OCHROMA 1 65 



A. Tonduz (no. 13,498). The following additional specimens have 

 been seen: El Salvador, Renson 86; Bismarck, Panama, Williams 

 607; Ancon Hill, Panama, Bro. Celestine 119. The following are our 

 own collections : Orotina, 94 ; Zapotal, 6 ; Abangarez Pueblo, 5 ; 

 Tempisque, 113, 170, 189; all from Costa Rica. We collected it also 

 at Escuintla, Guatemala. 



The flowers are borne in December, January, and February. The 

 fruit matures in February, March, and April, that is, the dry season 

 of the region where the tree occurs. 



This is the smallest-flowered species known. It is widely distributed 

 on the Pacific slope of Central America from sea-level up to 500 or 

 600 meters and may be the form mentioned by Tonduz as "carac- 

 t^ristique pour la zone inferieur c6tes nord et ouest de Cocos Island, alt. 

 o-ioo m." 



Ochroma veluHna differs from the other species in the following 

 respects: Its wood is harder and heavier; the leaves are densely 

 velutinous on both sides, are nearly or more often quite entire, and are 

 noticeably longer than broad, with a wide sinus at the base; the flowers 

 are small; and the calyx tube is cylindric, firm, and woody. 



7. Ochroma bicolor, n. sp. Ouapiues baIvSa. 



A tree attaining large size, 25 meters high and i meter in diameter, 

 with long, straight bole in the forest, and excurrent in habit when 

 growing in the open; bark mottled gray and white; leaves chalky white 

 with minute stellate hairs beneath, these 12 to 20- (mostly 20) branched, 

 dark, glistening green and glabrous above, thick and leathery, tending 

 to be acuminate, especially on the older trees, nearly as broad as long, 

 about 32 cm. across, with 2 to 4 obsolete primary lobes on each side, 

 the margin between these usually regularly and very shallowly sinuate - 

 lobed, with a vein terminating in each secondary lobe, the marginal 

 vein prominent; flowers with petals strongly reflexed at an thesis, 10 

 cm. long with petals extended; calyx tube firm, 5.5 to 6 cm. long, 

 granular-puberulent outside, silvery-sericeous within; calyx lobes 1.5 

 cm. long, plane on the back, triangular, acute, the inner ones with 

 felted margins; petals white, abruptly expanded above, the claw i 

 cm. broad, the limb orbicular, 3 cm. in diameter; stamen tube and 

 stigma equal in length, slightly shorter than the extended petals, much 

 exceeding the recurved petals at an thesis; mass of anthers as broad as 

 long; pod, 16 cm. long; down, light-colored; seed with very short or 

 obsolete funicle, 4 mm. long, 2 mm. thick. — ^Flowering in November 

 and December; fruiting in January, February, and March. 



The type is our no. 10, collected on the grounds of the residence of 

 Superintendent J. H. Wilson of the United Fruit Company, at Guapiles, 

 Costa Rica. We also collected this species at Guacimo, along the 

 Parisiraa River. It is abundant throughout the whole region known 



