PITT1ER- — TREATMENT OF THE GENUS CASTILLA. 275 



Receptacles of the complemental male inflorescence geminate, 1.5 to 2 cm. 

 long, 1.3 cm. in diameter, broadly obconical and attenuate into a rather long 

 and slender stipe, provided at the base with a short bracteal involucre. Scales 

 broad, short, and with dark tips. Dehiscence slit-like. Blades, bracteoies, and 

 stamens as in primary inflorescence. 



Receptacles of the pistillate inflorescence rather deeply cupuliform and with 

 the marginal bracts still strongly incurved at the time of anthesls. Outer 

 scales very broad, rounded at tip, rarely mucronate, tomentose, imbricate in 

 :: or 4 rows. Flowers 3 to 4 mm. long, free almost from the base. Free part 

 of the perianth hairy, not lobulate at tip. closed but for a small round aper- 

 ture giving egress to the style. Ovary immersed in the receptacle. Style 

 slender, about 2.5 mm. long, entirely glabrous; stigmas 1.5 to 2 mm. long, 

 linguiform, dividing a little below the tip of the perianth, papillose-rugose on 

 the inner (upper) face, smooth outside. 



Fructiferous receptacles sessile, deep cupuliform, 4 to 5 cm. in diameter, 

 the outer scales large, partly confluent and indistinct. Achenia 12 to 10 to 

 each receptacle, about 2 cm. long, contiguous through their whole length, with 

 ,a prominent, pyramidal, acute tip. Seeds more or less ovoid, 12 to 13 mm. 

 long and about i) mm. thick; episperm transparent; arillus (in alcohol) 

 brownish. 



Panama: Around the hospitals at Ancon, Canal Zone, Mrs. K. D. Gaillard, 

 flowers and fruit, February, 1910 (U. S. National Herbarium no. 503174). 



The above description is based on the fresh material kindly sent from 

 Ancon by Mrs. Gaillard, but the first idea of the specific status of the Panama 

 type was gathered from the comparison by Mr. O. F. Cook of Hooker's plate" 

 with material of the other Central American species. Our specimens are found 

 to possess all the characters attributed by Mr. Cook to his C. panamensis, and 

 to agree also fairly with Hooker's descriptions and illustrations, so that there 

 is little doubt left as to the identity of our tree with the one grown in Ceylon 

 from seeds or cuttings collected on the Isthmus. 



9. Castilla nicoyensis Cook, Science n. ser. 18:438. 1003. 



Plates 40-12. Figure 53. 



A medium-sized tree, 10. to 20 meters high. Limbs divaricate, ascending, or 

 horizontal. Floriferous twigs covered with a dense coating of rather long, 

 brownish hairs, longitudinally striate when dry and rilled with a thick, white 

 pith. 



Leaves of medium size, deciduous. Petioles 1 to 2 cm. long, thick and densely 

 hairy. Leaf blades 20 to 46 cm. long, 10 to 20 cm. broad, more or less cordate- 

 emarginate at base, acuminate at tip, covered on the upper face with sparse 

 hair, this thicker on the midrib and primary veins, paler and hairy, especially 

 on the veins, beneath. Nervation regular, prominent beneath. Margin dis- 

 tinctly dentate-sinuate, with tufts of hair on the teeth.'' Stipules caducous, 

 rather small (5 to 7 cm. long, 2 to 3 cm. broad), lanceolate-acuminate, purplish 

 and smooth inside, hairy-tomentose outside, with a whitish marginal line. 



Receptacles of the primary male inflorescence caducous, geminate, usually 

 two pairs in each axil, opening out when mature into a fiat disc, 2.5 to 3.5 cm. 

 in diameter. Stipes 1.5 to 2 cm. long, rather slender, hairy, provided with free, 

 triangular bractlets. Scales of receptacles in 5 or 6 rows, rather large (about 



"Trans.. Linn. Soc. II. 2:209. pi. 27. 1885. 



h The young leaves are dark green and sparsely hairy above, densely hairy- 

 tomentose beneath; the indentation of the margin is scarcely noticeable, and 

 the base is often only rounded or scarcely emarginate. 



