786 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



1. Erioxylum palmeri Rose, Contr. U. S. Nat. Herb. 13: 308. 1911. 

 Cienfugosia palmeri Rose, Contr. U. S. Nat. Herb. 1 : 308. 1895. 

 Known only from Colima, the type locality. 



Shrub, 1.5 to 2.5 meters high ; leaves broadly ovate, 5 to 12 cm. long, long- 

 acuminate, subcordate at base, sparsely and minutely stellate-pubescent ; petals 

 6 cm. long, minutely pubescent outside ; capsule 2 to 2.5 cm. long. 



2. Erioxylum aridum Rose & Standi. Contr. U. S. Nat. Herb. 13: 307. 1911. 

 Sinaloa, in coastal thickets ; type from Culiac^n. 



Slender shrub or tree, 3 to 6 meters high; bark gray; leaves broadly ovate, 

 1.5 to 3 cm. long, acute or obtuse, rounded at base, sparsely and minutely 

 stellate-pubescent ; petals about 5 cm. long, nearly black within below the 

 middle ; capsule 2.5 cm. long. "Amapola." 



The wood is sometimes used for fencing. The trunk is often 30 to 35 cm. in 

 diameter. 



96. BOMBACACEAE. Cotton-tree Family. 



Trees ; leaves simple or digitately compound, deciduous ; pubescence chiefly 

 of stellate hairs ; flowers small or large, often bracteolate ; calyx 5-lobate 

 or truncate or opening irregularly ; petals 5 ; stamens 5 to many, the filaments 

 free or united into a tube ; fruit dry or fleshy, 2 to 5-celled, dehiscent or inde- 

 hiscent ; seeds 2 to many in each cell. 

 Leaves simple. 



Stamen tube short 1. HAMPEA. 



Stamen tube elongate 2. QUARARIBEA. 



Leaves digitately compound. 



Seeds winged ; flowers in one-sided racemes 3. BERNOULLIA. 



Seeds not winged ; flowers mostly solitary. 

 Stamen tube dividing into 5 parts, each of these bearing several sessile 

 anthers at the summit ; trunk often spiny ; leaflets often serrate. 



4. CEIBA. 

 Stamen tube dividing into many fascicles or filaments, the anthers borne 

 on long filaments ; trunk unarmed ; leaflets entire. 

 Seeds 1.5 cm. or more in diameter ; flowers usually 20 cm. long or larger ; 

 stamen tube elongate, the fascicles repeatedly branched. 



5. PACHIBA. 



Seeds 6 mm. or less in diameter; flowers usually less than 15 cm. long; 

 stamen tube short, the fascicles dividing into simple filaments. 



6. BOMBAX. 



1. HAMPEA Schlecht. Linnaea 11: 371. 1837. 



Trees or shrubs ; leaves long-petiolate, entire or shallowly trilobate ; flowers 

 on axillary pedicels, usually fasciculate ; bractlets 3 or more, very small ; calyx 

 truncate or obscurely 5-lobate ; capsule 3-celled, the cells few-seeded ; funicle 

 dilated into a large fleshy aril. 



Capsule densely villous within; calyx truncate 1. H. integerrima. 



Capsule glabrous within or hairy only along the sutures. 



Capsule 1.5 cm. long, the cells about 3-seeded 2. H. trilobata. 



Capsule 3 cm. long, the cells many-seeded 3. H. tomentosa. 



1. Hampea integerrima Schlecht. Linnaea 11: 372. 1837. 



Veracruz ; reported from Tabasco ; type from Josocola, Veracruz. Central 

 America. 



Small tree; leaves ovate to rounded-ovate, 10 to 22 cm. long, acute or acumi- 

 nate, rounded or subcordate at base, entire, glabrous in age or nearly so: 



