320 
MERRILL. 
2. QUERCUS Linn. 
Involucres cup-shaped, saucer-shaped, or discoid, their bracts imbricate, free or 
united by their bases only, the apices always free § Pasania 
Leaves more or less pubescent or puberulent beneath. 
Leaves subcoriaceous, slightly pubescent beneath, at least along the midrib 
and lateral nerves, the reticulations lax, very distinct 1. Q. dementis 
Leaves firmly coriaceous, densely and uniformly ferruginous-pubescent beneath, 
the reticulations obscure 2. Q. jordanae 
Leaves entirely glabrous beneath, or at most minutely puberulent. 
Leaves mostly exceeding 12 cm in length 3. Q. llanosii 
Leaves 4 to 6 cm long 4. Q. luzoniensis 
Involucres cup-sliaped, their bracts connate into entire or denticulate concentric 
lamellae . § Cyclobalanus 
Gians manifestly longer than broad. 
Leaves more or less pubescent or puberulent beneath; glans never more than 
12 mm in diameter 5. Q. caudatifolia 
Leaves entirely glabrous beneath, glans exceeding 12 mm in diameter. 
Gians at least 2 cm in diameter 6. Q. merrittii 
Glans about 1.5 cm in diameter 7. Q. ovalis 
Glans at least as broad as long, frequently broader than long. 
Leaves 8 to 11 cm wide. 
Involucres inclosing less than one-third the glans; leaf-margins sometimes 
somewhat repand above - !. 8. Q. woodii 
Involucres inclosing about three-fourtlis the glans; leaf-margins entire. 
9. _ Q. castellarnauiana 
Leaves 7 cm wide or less. 
Leaves more than 6 cm long, strongly acuminate, entire. 
Lamellae of the involucre 5 to 8, usually denticulate. 
Leaves densely cinereous-ferruginous-puberulent beneath. 
10. Q. acuminatissima 
, Leaves glabrous beneath. 
Leaves usually abruptly acuminate. 
Leaves 7 to 15 cm long; reticulations on the lower surface fine 
but evident 11 .Q.soleriana 
Leaves 12 to 25 cm long; reticulations on the lower surface 
obsolete 9. Q. castellarnauiana 
Leaves gradually and slenderly caudate-acuminate, 0 to 8 cm 
long 12. Q. philippinensis 
Lamellae of the involucre 3 or 4, obscurely denticulate; leaves abruptly 
short-acuminate, the acumen blunt 13. Q. bennettii 
Leaves 5 cm long or less, acute, obtuse, or very obscurely acuminate, the 
margins sometimes slightly sinuate above , 14. Q. merrillii 
Involucres ovoid, externally tubercular, closed and inclosing the whole glans but 
not adnate to it except at the base -. § Chlamydobalanus 
Leaves with about 15 pairs of lateral nerves 15. Q. cooperta 
Leaves with 10 to 12 pairs of lateral nerves.—. :... 16. Q. reflexa 
Involucres large, thick, woody, turbinate, the upper portion tubercled, nearly 
enveloping the glans and adherent to it on the base and sides ; glans bony. 
§ Lithocaepus 
Leaves somewhat pubescent beneath, the branchlets densely ferruginous-villous; 
involucre 3 cm in diameter... 17 .Q.curranii 
