Fagaceae 377 



1. Fagus crenata BI. F. sicbotdii Endl.; F. sylvatica var. tree of temperate regions; Hokkaido, Honshu, Siiikoku, Kyu- 



sieboldii (End!.) Maxim. Buna. Tree with grayish bark; shu. 



young branchlets slightly long-pubescent, soon glabrous; leaves 2. Fagus japonica Maxim. Inu-buna. Young branch- 

 ovate or broadly so, or rhombic-ovate, 5-8 cm. long, 3-5 cm. lets soon becoming glabrous; leaves ovate or ovate-elliptic, 5-8 

 wide, short-acuminate, broadly cuneate to obliquely rounded cm. long, 2.5-5 cm. wide, short-acuminate, obsoletely undulate, 

 at base, undulately and obsoletely toothed, long-pubescent rounded to obtusely rounded at base, long-pubescent on both 

 while young especially on nerves beneath and on margin, the sides while young, soon glabrate above, the hairs persistent 

 lateral nerves of 7 to 11 pairs, ascending, straight or nearly so, beneath, the lateral nerves of 10 to 14 pairs, the petioles 8-10 

 the petioles 3-10 mm. long, slightly pubescent; involucre about mm. long, soon glabrate; involucre 6-8 mm. long, about 1/2- 

 15 mm. long, nearly as long as the nuts, provided with rather 2/3 the length of the nuts, with a short ovate-deltoid appen- 



dense linear awnlike fleshy appendages 3-7 mm. long, the dage, the peduncles slender, glabrous, 3-4 cm. long. Apr.- 



peduncles rather thick, pubescent. May. Important forest- May. Mountains; Honshu, Shikoku, Kyushu. 



2. QUERCUS L. Ko-nara Zoku 



Evergreen or deciduous trees, rarely shrubs; leaves alternate, short-petiolate or subsessile, pinnately nerved, simple, toothed or 

 entire, sometimes pinnatifid; staminate flowers in slender, pendulous aments, the perianth 4- to 7-merous; stamens 4-12; pis- 

 tillate flowers solitary or paired, usually in short spikes; ovary 3(-5)-locular; styles short or elongate, broadened above, the 

 stigma on the upper side; nuts (acorns) globose to subcylindric, enveloped at base or nearly completely by a cup-shaped in- 

 volucre (cupule) sculpmred with ringlike annuli or scales. More than 200 species, in the temperate to subtropical regions 



of the N. Hemisphere. 



lA. Involucres with ringlike annuli; evergreen trees. 



2A. Adult leaves glabrous, green beneath, often slightly brown-tinged when dried, usually decurrent on the petiole. 



3A. Petioles 2-4 cm. long; leaves entire, loosely arranged on branchlets 1. Q- acuta 



3B. Petioles less than 2 cm. long. 



4A. Leaves vivid to pale green when dry, thinly coriaceous, the midnerve not impressed above 2. Q. hondae 



4B. Leaves dark brownish when dry, coriaceous, densely disposed toward the tip of branchlets; midrib impressed above. 



Z.Q. sessili folia 

 2B. Adult leaves glaucous or densely pubescent beneath. 



5A. Underside of adult leaves, branchlets, and petioles with dense yellow-brown tomentum 4. Q. gilva 



53. Underside of leaves glaucescent, glabrous or with scattered appressed hairs. 



6A. Leaves with persistent hairs thinly dispersed beneath, oblong or obovate-elliptic, the teeth prominent, the lateral nerves prom- 



inendy raised beneath; nuts maturing in autumn of first year 6. Q. glauca 



6B. Leaves glabrate beneath, lanceolate or broadly lanceolate, the teeth low, the lateral nerves only slightly raised beneath. 

 7A. Costa not sunken on upper side; nuts ripening in autumn of the first year; branches rather stout, dark purple-brown. 



5. Q. myrsinaejoUa 



73. Costa sunken on upper side; nuts ripening in autumn of second year; branches slender, gray-brown 7. Q. salicina 



13. Fruiting involucres with imbricate scales; deciduous or evergreen trees. 



8A. Evergreen small tree or large shrub with leaves less than 6 cm. long 8. £>. phillyraeoides 



83. Deciduous trees with leaves 6-25 cm. long. 



9A. Leaves obovatc to narrowly so, or elliptic, usually prominently toothed or dentate, the teeth not awn-tipped, rarely only mucro- 

 nate. 

 lOA. Branches relatively slender, glabrous or slighdy pubescent while young; teeth of leaves usually ascending, obtuse or mucronate; 

 scales of fruiting involucres short, appressed or slightly adnate and scalclike. 

 11 A. Petioles 0-5 mm. long; leaf-blade long-pilose while young, becoming entirely glabrous, pale green or sometimes slightly 



glaucescent beneath 9. Q. mongolica 



113. Petioles 5-30 mm. long; leaf-blades with long thin deciduous hairs, usually glaucous, sometimes with persistent stellate- 

 pubescence beneath. 

 12A. Leaves 6-15 cm. long, thinly appressed-pubescent beneath, with 7-12 pairs of lateral nerves; involucres distinctly 



stipitate; branches slender, pubescent while young 10. Q. serrata 



123. Leaves 10-25(-35) cm. long, short stellate-pubescent beneath, sometimes appressed-pilose only while young, with 10-15 



pairs of lateral nerves; involucres nearly sessile; branches rather stout, soon becoming glabrous 11. p. aliena 



lOB. Branches stout, densely short yellowish villous at least while young; leaves with large spreading rounded teedi; scales of 



fruiting involucres linear, elongate, spreading to somewhat recurved 12. Q. dcntata 



9B. Leaves oblong-lanceolate, with awn-tipped teeth. 



13A. Leaves whitish and densely stellate-pubescent beneath M. Q. variabilis 



133. Leaves glabrous or very thinly pilose except for tufts of axillary hairs beneath l^. Q. acutissima 



1. Quercus acuta Thunb. Cydobalanopsis acuta abruptly long-acuminate, pubescent while young, soon becom- 



(Thunb.) Oerst.; Q. buergeri Bl.; Q. laevigata BI.; Q. margi- ing glabrous, entire, often slightly undulate, abruptly decur- 



nata Bl.; C. buergeri (Bl.) Oerst.; C. laevigata (Bl.) Oerst.; rent on the pedole, lustrous and deep green above, slightly 



C. marginata (Bl.) Oerst. Akacashi. Evergreen; branches paler and often becoming reddish beneath when dried, with 



stout, dark brown, densely long red-brown pubescent while 8-13 pairs of lateral nerves, the midrib not impressed above, 



young, soon becoming glabrous; leaves coriaceous, ovate-ellip- the petioles slightly flattened, not grooved, 2-4 cm. long; 



tic to narrowly so, or oblong, 8-20 cm. long, 3-6 cm. wide, staminate aments pendulous, the bracts scarious, 3-8 mm. 



