Oaks of the World

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  Quercus grahamii
Author Benth. 1840
Synonyms acutifolia var. angustifolia A.DC 1864 , nom. illeg.
acutifolia var. bonplandii A.DC 1864
anglohondurensis C.H.Muller 1942 Diagnosis here
conspersa f. caudata Trel. 1924
conspersa f. ovatifolia Trel. 1924
grahamii f. brevipes Trel. 1924
grahamii f. nelsonii Trel. 1924
monserratensis C.H.Muller 1942    (A. Camus : n° 382) Diagnosis here
sartorii Botteri ex A.DC 1864, not Liebm. 1854
tenuiaristata Trel. 1938
tonaguiae Trel. 1924
Local names encino chilillo ;
Range Mexico (Chiapas, Nayarit, Durango, Guerrero, Jalisco, Michoacan, Puebla, 0axaca) from 600 m to 2500 m ; Guatemala; Belize; Honduras;
Growth habit 10-30 m ; trunk from 30 cm to 1 m in diameter;
Leaves

5-14 cm long, 2-4 cm wide; 3-4 times as long as wide; persistent until next leaves appear; subcoriaceous, stiff; more or less narrowly elliptic or elliptic-lanceolate; apex pointed, sometimes attenuate, bristle-tipped; base rounded or attenuate, often oblique; margin often undulate, entire or more often with 5 to 13 short, bristle-tipped teeth on each margin, sometimes only on apical 2/3; mature leaves shiny above, glabrous or with trichomes along midrib; paler underneath, glabrous or sometimes with axil tufts of stellate hairs, without glandular hairs; 5-13 straight veins pairs flat adaxially, slightly raised beneath; epidermis smooth, not papillose; 0.9-2 cm long, glabrous petiole;

Flowers from January to April; male catkins 7-13 cm long, hairless, with 10-35 flowers; pistillate ones 0.5-2 cm long, 1 to 5-flowered;
Fruits acorn 1-1.9 cm long, glabrescent, with thin pericarp; singly or paired, sessile or on a very short peduncle, ovoid; enclosed for 1/3 or 1/2 of length in a shallow cup with straight rim, covered with smooth, appressed, tomentose scales; maturing in 2 years;

Bark, twigs and
buds

dark coffee-coloured, furrowed bark; 1 to 3 mm long twigs, at first yellow brown tomentose, then glabrous with few stellate hairs, reddish brown, with yellow lenticels; brown, ovoid, pointed buds, 3 to 6 mm long, with hairy scales; stipules 5 mm long, pubescent, deciduous;
Hardiness zone, habitat a little tender, but withstands -15C;
Miscellaneous

-- A. Camus : n 307;
-- Sub-genus Quercus, section Lobatae, Ssubsection Erythromexicanae, Group Acutifoliae;

-- For Susana Valencia-A. 2015, Q. grahamii Benth. is from now on the name to be assigned to this species formerly named Q. acutifolia, the term 'acutifolia' being proposed to replace the name Q. conspersa (which becomes a simple synonym).

Subspecies and
varieties
-- hybridizes with Q. mexicana;
Pictures