Juglans steyermarkii

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Juglans steyermarkii
Systematics
Rosids
Eurosiden I
Order : Beech-like (Fagales)
Family : Walnut family (Juglandaceae)
Genre : Walnuts ( juglans )
Type : Juglans steyermarkii
Scientific name
Juglans steyermarkii
WEManning

Juglans steyermarkii is aspecies of tree of the genus walnuts ( Juglans ) endemic to Guatemala . The specific epithet honors the American botanist Julian Alfred Steyermark .

features

Juglans steyermarkii is a 17 m high tree with a gray, furrowed bark . The twigs are densely hairy with glands. The terminal bud is elongated and dense gray hairs. The leaf scar is only slightly bent.

The leaves are large, up to 60 cm long and 30 cm wide. A terminal leaflet is usually missing. The rachis is conspicuously densely covered with reddish glandular hairs. The mostly 16 to 18 leaflets are each 14 to 17 cm long and 5 to 8 cm wide, seated or with only short stalk. Their shape is oval to oval-lanceolate, the leaf margin is usually finely serrated. The upper side of the leaf is provided with small glandular hairs, the underside on the large and small nerves with reddish glandular hairs, on the blade with single or paired, whitish, pointed hairs. The leaf base is truncated to broadly rounded, the end pointed or pointed.

The flowers are unknown. The almost ripe fruits are wrinkled, almost spherical to pear-shaped and trimmed at the base, their diameter is 4 cm, the height 4.5 cm. The surface is densely named with reddish glandular hairs. The shell is not very thick. The nut is deeply grooved and has rounded ribs.

distribution

Juglans steyermarkii is only known from the place where the type specimen was found : from the vicinity of Huehuetenango in Guatemala , near the border with Mexico on the Rio Trapichillo at 1200 to 1300 m above sea level.

Individual evidence

  1. ↑ PC Standley, JA Steyermark: Flora of Guatemala , Fieldiana. Botany. Volume 24, Part 3, 1952, p. 358.

supporting documents

  • Wayne E. Manning: The Genus Juglans in Mexico and Central America . In: Journal of the Arnold Arboretum. Volume 38, 1957, pp. 121-150.