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  Quercus salicifolia

Née 1801 Anales Ci. Nat. 3: 265

Diagnosis here

Synonyms acapulcensis Trel. 1924 diagnosis here
chiriquensis Trel. ex C.H.Muller 1942
duratifolia C.H.Muller 1942    (A. Camus : n° 330) diagnosis here
mexicana var. glabrata Liebm. ex Seem. 1856
mulleri Martinez
panamandinea C.H.Muller 1942 Misc. Publ. U.S. Dept. Agric. 477: 26 Diagnosis here
tahuasalana Trel. 1924 diagnosis here
Local names encino saucillo;
Range Mexico in the Sierra Madre del Sur, Pacific side (Chiapas, Colima, Guerrero, Jalisco, Michoacan, Oaxaca, Puebla, Querretaro), Costa Rica, Guatemala, Honduras, El Salvador, Panama, Nicaragua; 800-2000 m;
Growth habit 10-25 m tall with trunk to 0.6 m in diameter; cylindrical trunk; dense rounded crown;
Leaves 7-15 x 2-4 cm; 3.6 to 4.5 times longer than wide; deciduous; leathery; elliptic-lanceolate; apex acute, acuminate, aristate; base narrowly rounded; margin thick, not revolute, wavy, entire; adaxially dark, shiny glaucous green, hairless; pale green beneath, slightly glaucous, hairless or with some fascicled trichomes at axils; 15-25 vein pairs, not really parallel, at an angle more than 45° with the midrib, weakly raised beneath; epidermis smooth, not bullate; petiole 1-6 mm, pinkish, glabrescent;
Flowers December to January; male catkins 4-6 cm long, few-flowered; pistillate inflorescences 0.2-0.8 cm long, with 1-4 flowers;
Fruits acorn 1-1.6 cm long x 0.8-1.2 cm wide; cylindric-elliptic; mucronate and pubescent; singly or paired; stalk 0.5-1 cm; pericarp pubescent inside; enclosed 1/4 to 1/3 by cup; cup half-round 1.5-2 cm in diameter, with pointed, shiny, pale brown scales; maturing in 1 year from April to July;

Bark, twigs and

bark rough, yellow grey to blackish, with vertical ridges and horizontal furrows; twigs slender, 1-2.5 mm thick, glabrescent, dark pinkish brown; marked pale lenticels, 0.5-1 mm long; buds oval lanceolate, pointed, 1.5-5 mm long, with silky scales; stipules 5 mm long, deciduous;
Hardiness zone, habitat hardy zone 8; slow-growing; wet mountains forests;
Miscellaneous -- A. Camus : n° 405;
-- Sub-genus Quercus, Section Lobatae, Subsection Erythromexicanae, Group Eugeniaefoliae;
-- Close to Q. pinnativenulosa, which differs from Q. salicifolia in having narrower leaves longly acuminate at apex, with a bristle-tip often in a spiral, acorns maturing in 2 years, glabrous leaves without any shade of glaucous, base of leaf cuneate, longer petiole.
-- Hybridizes with Q.benthamii, Q.cortesii and Q.sapotifolia;

-- Q.mulleri (Anales Inst. Biol. Univ. Nac. México 24: 51) is a true species for The Plant List 2013, but it could be a variant with leaves having 25-30 vein pairs at an angle of 60° with the midrib; Mexico (Oaxaca). Threatened (IUCN Red List Category : CR)

-- Q.panamandinea is, for Govaerts & Frodin, a true species; the same Authors seem not to know Q. chiriquensis...(they don't quote this name in their World Checklist of Fagales).

--For Susana Valencia Avalos 2004, Q.duratifolia is a true species, but not for Linares, J.L., (El Salvador) in 2006, nor for The Plant List 2013.

Subspecies and