rowi^ee;: synopsis of* the; genus ochroma 163 



Known in Cuba as "lanero;" in Jamaica as "corkwood," "down- 

 tree," "dum," and "bombast mahoe." 



Cuba: Eastern Cuba, 1856-57, C. Wright 38; San L,uis, Oriente, 

 April 2, 1909, Britton 2334; Sevilla 'Estate near Santiago, August 31, 

 igo6, N. Taylor 140 (a tree 30 meters high, the trunk 28 cm. in diameter). 



HispanioIvA: Taradia, prope Barahona, 1910, Tuerckheini 2826; 

 without locality, Wright, Parry & Brummel 20, 21. 



Porto Rico: Manati, April 4, 1887, Sintenis 6766; Utuado, March, 

 1906, M. A. Howe; San Juan, December, 1898, Dignomtz 780. 



Jamaica: Castleton, March 21, 1915, Harris 11962. 



3. Ochroma limonensis, n. sp. Limon baIvSA. 

 A tree of very rapid growth, attaining large dimensions, up to a 



meter in diameter and 30 meters in height; bark gray, somewhat 

 mottled; wood white, the annual rings indistinguishable; leaves large, 

 nearly orbicular, 25 cm. across, obsoletely 3- to 5-lobed (the margin 

 entire), nearly or quite glabrous above, refescent-tomentose beneath; 

 hairs 7 to 10- (mostly 8) branched; flowers 18 cm. long, yellowish 

 white; calyx tube 9 cm. long, cylindric, glabrous but warty on the out- 

 side, hairy within; calyx lobes acuminate, carinate on the back, 4 cm. 

 long, 2 cm. wide at the base, the inner with feltlike margins ; pods, 15 

 cm. long; funicle about half as long as the seed. — Flowers l)orne in 

 May and June; fruit in July and August. 



This is the balsa of the lowlands of the Caribbean coast of Costa 

 Rica and Panama, extending as far west as the Reventazoh River, 

 Costa Rica, and east into Panama. Fine groves have developed along 

 the Banana, Bananito, Estrella, and Sixaola Rivers. Our nos. i, 2, 

 and 3 are of this species, no. i, collected on vSan Clemente Farm east 

 of the Bananito River, Costa Rica, being the type. No. 2 is from a 

 tree at Zent; no. 3 was collected near Moin Junction. The Zent tree 

 is of special interest. It was started as a seedling in April, 19 15, and 

 was photographed September 15th of that year. When measured by 

 us in May, 191 8, it was 16 inches in diameter, and had therefore grown 

 at the rate of five inches per year. Local observers agree that this 

 individual is not in any way exceptional. 



4. Ochroma grandiflora, n. sp. ^ Ecuador balsa. 

 A tall tree with mottled gray bark and very light wood; leaves on 



mature trees nearly entire, orbicular, 20 cm. wide, on young trees 

 lobed, very large (up to 90 cm.), rufescent beneath, glabrous above; 

 flowers 15 to 18 cm. long, showy; calyx tube 7 cm. long, spreading above, 

 3 cm. wide at the base, 7 cm. wide at the top, granular-puberulent out- 

 side, hairy within; calyx lobes 4 cm. long, 3 cm. wide at the base, 

 carinate, the inner ones broadly margined ; petals large and showy, 

 exceeding the stamens and style, the Umb 5 cm. broad, gradually 



