274 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Mexico : Lumija (Tabasco), Cook, female flowers and fruits, June 25. 11300 

 (alcoholic materials); Hacienda Kanachen (Yucatan); Schott 777, female 

 flowers, March, 1866; Salto de Agua (Tabasco) ; Cook 150, leaves, June, 1906 

 (U. S. National Herbarium no. 593979). 



Guatemala : El Crique, Alta Verapaz, Cook 803, 807, flowers and fruit, April 4, 

 1902 (U. S. National Herbarium nos. 408520-1, 40852G-8; photographs 3784, 

 3794-3800, 3302-3; Las Tinajas near El Crique, Alta Verapaz; Cook 817, April 

 4, 1902 (T T . S. National Herbarium no. 408540); Secanquim, Alta Verapaz, 

 altitude 550 meters, Cook 42, April 19, 1904 (U. S. National Herbarium, nos. 

 593980-2; alcoholic materials of leaves, flowers, and fruits; photographs 7201, 

 7214, 7217, 7287-90); Panzos (Alta Verapaz); Cook 10, leaves, flowers, and 

 fruits, April, 1904 (I'. 8. National Herbarium, nos. 593983-4; alcoholic mate- 

 rials; photographs 7133-8, 7142-7; Escuintla, altitude 300 meters; Donncll 

 Smith 250(5, young fruits, February, 1892; Chocon River Plantation, Alta 

 Verapaz; 8'. Watson, March, 1SS5, leaf of a seedling (Gray Herbarium). 



Explanation of Plates 35-39.— PI. 35, a young Castilla guatemalensis at El Crique, 

 showing habit; U. S. National Herbarium photograph ^784. PI. 3G, a, clusters of 

 primary male inflorescences; b, another cluster, showing long stipes and insertion on 

 branchlet; c, complemental inflorescence, after taking away the female receptacle; &, 

 female receptacle with the accompanying complemental male receptacles ; e, female recep- 

 tacle inserted on branchlet; on the left are seen the scars left by the leaf (below) and by 

 the complemental male inflorescence (above) ; /, a ripe fruit ; g, seeds, some with the testa 

 partly cut to show arillus. PI. ?,1, flowering branchlets, the one on the left with primary 

 male inflorescences, the one on the right with complemental and female inflorescences. PI. 

 38, fruits at various stages, none ripe. PL ;;g, fructiferous branchlets, at Secanquim. 

 8. Castilla panamensis Cook, Science n. ser. 18: 43S. 1903. Figure 52. 



A medium-sized or large tree, rather low and spreading, as seen in the open. 

 Limbs divaricate, obliquely ascending, nude. Bark of young twigs longltudi-' 

 nally plicate (in dry specimens) and densely hairy. 



Petioles thick, densely hairy, 0.8 to 1.2 cm. long. 

 Mature leaf blades ovate-elliptic, cordate at base, 

 more or less rounded above and abruptly contracted 

 into a narrow acumen nearly 2 cm. long, 20 to 30 cm. 

 long, 10 to 12 cm. broad, dark fjreen, rough and 

 sparsely pubescent above except on the hairy midrib, 

 paler or rufescent below, with the midrib and pri- 

 mary veins hairy, and the finer veins and anastomosis 

 more sparsely hairy-pubescent ; 23 to 27 primary veins 

 on each side of the midrib; margin obscurely sinuate, 

 the intermediary teeth marked by tufts of stiff hairs. 

 Stipules caducous, at times short and broad (3.5 by 

 3.5 em.), at times longer and narrow (G by 2.5 cm.), 

 pubescent outside, smooth and of the same pale brown 

 color inside. 



Receptacles of the primary male inflorescence hi 

 clusters of 4, caducous, flabellate, more or less kidney- 

 shaped, very uniform in size, about 1.4 cm. long and 

 2 em. broad. Pedicels over or under 1 cm. long 

 with a calyx-like bracteal involucre, S mm. long, at the base. Receptacles cov- 

 ered outside with G to 8 concentric rows of ovate-acuminate, imbricate, dark- 

 tipped scales. Stamens glabrous, about 4 mm. long, irregularly distributed 

 isolated along the radial blades or in clusters at the ends of the lateral branches 

 of the same, and with or without bractlets; blades and bractlets eiliale- 

 puboseout ; lilaments 2.5 to 3 mm. long ; anthers ovoid or subreniform ; connective 

 thick. 



Fie,. 52.— Floral details of 

 daatiUa panamensis. a, 

 Transverse section o f 

 primary mole inflores- 

 cence ; b, male flower ; 

 c, c, style and ovary. 

 a-c, Scale 3. 



