320 MERRILL. 



•2. QUERCUS Limi. 



liixoliiiTcs fiii>sliiiji('(l. siuu-('r-sli;i]n'(l, or discoid, tlicir hrai-ts iiiilnicatc. fret- or 



united by tlieir bases only, tiie upices always free § Pasama 



Leaves more or less pubescent or puberulent beneatli. 



LeaA'es subcoriaceous, slightly pubescent beneath, at least aloiijf the niidril) 



and lateral nerves, the reticulations lax, very distinct \. Q. clonciifis 



Leaves firmly coriaceous, densely and uniformly ferruginous-pubescent beneatli, 



the reticulations obscure 2. (J. jonlainie 



Leaves entirely glabrous beneath, or at most minutely puberulent. . 



Leaves mostly exceeding 12 cm in length 3. Q. llaiiof<ii 



Leaves 4 to fi cm long 4. Q. luzoniensis 



Involucres cup-shaped, tlieir bracts connate into entire or denticulate concentric 



lamellae § Cyclobalanus 



Glans manifestly longer tiian broad. 



Leaves more or less pid)escent or puberulent beneath ; glans never more than 



12 mm in diameter 5. Q. caudatifoJia 



Leaves entirely glabrous beneath, glans exceeding 12 mm in diameter. 



(Jlans at least 2 cm in diameter Q. Q. merrHtii 



Glans about 1.5 cm in diameter 7. Q. ovalis 



Glans at least as broad as long, freqiiently broader tlian long. 

 Leaves S to 1 1 cm wide. 



Involucres inclosing less than one-third the glans; leaf-margins sometimes 



somewhat repand above H. Q. iruoilii 



Involucres inclosing about Ihree-fouitlis the glans; leaf-margins entire. 



11. Q. cuntcUdrnduiuna 

 Leaves 7 cm wide or less. 



LeaA'es more than 6 cm long, strongly acuminate, entire. 

 Laniellte of the involucre 5 to 8, usually denticulate. 



Leaves densely cinereous-ferruginoiis-jjuberulent beneath. 



10. (J. aciuHinol issintti 

 Leaves glabrous beneath. 



Leaves usually abruptly acuminate. 



Leaves 7 to 15 cm long; reticulations on the lower surface fine 



but evident 11. Q. sotcriand 



Leaves 12 to 25 cm long; reticulations on the lower surface 



obsolete 9. Q. castcUarnauiami 



Leaves gradually and slenderly caudate-acuminate, to 8 cm 



bmg 12. (J. phUippineiusis 



Lamella' of the iiniilncre 'A or 4. obscurely denticulate: leaves abruptly 



short acuniinati', the acumen blunt \:i. (J. hcinirl Hi 



Leaves 5 cm long or less, acute, obtuse, or very obscurely acuminate, the 



margins sometimes slightly sinuate above , 14. y. nierrillii 



Involucres ovoid, externally (\d)ercnlar, closed and inclosing the whole glans but 



not adnate to it exce|)t at the base § Chlamydomai.anis 



Leaves with about 15 pairs of lateral nerves My. Q. cooprrUi 



Leaves with Id to 12 pairs of lateral nerves I(>. (/ rr//c.rf» 



Involucres large, thick, woody, turbinate, the n|i|)er jiortion tubercled, nearly 

 enveloping the glans and adhei-ent (o it on the base and sides; glans l)ony. 



S LiriKHAKl'l s 



Leaves somewhat pubesccnl licncath. the branclilet s densely ferrnginous-villous; 

 invdlucre '■'> cm in >liMnie|ei ]~. Q. ciirniiiii 



