Grevillea glauca Knight

Species

Angiosperms > Proteales > Proteaceae > Grevillea

Characteristics

Tall shrub or small tree, 4-8 m; bark hard, rough, blackish; all parts soft-tomentose by very short hairs, silky on the young shoots and persistently so on both faces of the leaf. Leaves simple, entire, ovate-lanceolate, acuminate, obtuse at the very apex by a terminal gland, tapering into the petiole, brown when young, grey when adult, in dry state between brown and grey, dull, (8-) 10-15 by (2½-)3-4½ cm; midrib somewhat prominent on both faces, nerves pinnate 10-15 pairs, straight, ascending and ± parallel to each other, with numerous oblique indistinct primary veins on both faces; petiole 1-1.5 cm, pubescent. Racemes dense, 7-15 cm, shortly peduncled, usually 3 together at the end of the branches, forming a loose, ± erect panicle; rhachis slender. Pedicels partly in pairs, 2-3 mm. Bracts narrow, minute, early caducous. Perianth tube slender, revolute under the globular limb, yellowish to greenish-white, 4-5 mm long. Torus small. Disk very prominent, semi-cupular, truncate, ± 2-lobed. Ovary glabrous, shortly stipitate; style 6-7 mm, filiform; stigma conical, straight. Fruit globular or nearly so, oblique, somewhat applanate, (2½-)3-4½ by 3 cm, dehiscing with 2 woody, hemispherical valves. Seeds 1 or 2, broadly winged, 2.5 cm diam.
More
Spindly erect shrub or small tree 2-10 (-15?) m tall. Leaves dorsiventral, entire, narrowly ovate to elliptic, 6-20 cm long, 10-65 mm wide; margins flat; surfaces similar, pubescent tending more appressed below. Conflorescence terminal, usually 2-8-branched from near base; primary peduncle ±erect but branches usually decurved to pendulous; unit conflorescence decurved to pendulous, cylindrical, 6-18 cm long, subsynchronous to weakly basipetal. Flowers transversely oriented with sutures extrorse. Flower colour: perianth and style creamish to greenish white. Perianth subsericeous to tomentose outside, glabrous inside. Nectary arcuate. Pistil (10-) 14-16.5 mm long, glabrous; pollen-presenter an erect narrow cone. Follicle subglobose to subovoid, 24-40 mm long, rugose, glabrous.
A large shrub or small tree. It has a single stem. It grows 3-15 m high. The bark is dark grey and has furrows. The leaves are 6-20 cm long and 1.5-6.5 cm wide. They are narrowly oval and have leaf stalks. They point upwards. The flowers are in a curve or hanging head. This is 8-18 cm long by 2-3 cm wide. The flowers are creamy white or greenish white. The fruit are 2.5-4 cm long and 2.5-4 cm wide. They are lens shaped. The seed are 7-15 mm long and wide.
Life form -
Growth form
Growth support free-standing
Foliage retention evergreen
Sexuality -
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 3.5 - 11.5
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

A tropical plant. It suits hot humid summers and mild dry winters. It grows in areas with a 500-1500 mm summer rainfall. It grows in a range of soil types. It can be in open forest, grassland or in waterlogged soils at low altitudes. It regrows after fire.
More
Grows in a wide range of habitats including seasonally dry open forest, woodland, savanna, sometimes in coastal dune heath, in light sandy or gravelly often granitic soils, sometimes in low waterlogged areas.
In open savannahs of low Melaleuca» often associated with Banksia dentata, apparently more common in the savannah-forest substage, occasionally common on sour grey soils, at low altitudes. Fl. fr. Jan.-Dec.
Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 8-12

Usage

Uses. Wood dark brown, prettily marked, close-grained and hard, of a greasy nature which prevents it shining when polished.
More
The seeds are reported to be eaten raw by the Koka-amura people in New Guinea.
Uses material social use wood
Edible seeds
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Plants can be grown from seed sown fresh. The seed are best nicked to allow water to enter. Seed can be soaked in hot water.
Mode seedlings
Germination duration (days) 20 - 25
Germination temperacture (C°) 23 - 26
Germination luminosity light
Germination treatment soaking
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Grevillea glauca world distribution map, present in Australia, Hong Kong, Malaysia, and Papua New Guinea

Conservation status

Grevillea glauca threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:703836-1
WFO ID wfo-0000709199
COL ID 3HCQ7
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Grevillea gibbosa Grevillea glauca