Eucalyptus angularis Brooker & Hopper, Nuytsia 9: 8
T: Mt Benia, SW slope, 30°14'S,
3 Mar. 1983, M.I.H.Brooker 8013 & S.D.Hopper: holo: PERTH;
iso: CANB, NSW.
Mallee to 3 m tall. Forming a lignotuber.
Bark rough for basal ca 1m of stem, grey, smooth above.
Branchlets angular; lacking
oil glands in the pith.
Juvenile growth (coppice or field seedlings to 50 cm):
Adult leaves alternate, petioles 1-1.8 cm long; blade lanceolate
to falcate, 5.5-10 cm long, 1.5-1.7 cm wide, base tapering to petiole,
margin entire, apex pointed, concolorous, glossy, green, side-veins
greater than 45° to midrib, reticulation, intramarginal vein remote
from margin, oil glands island and intersectional.
Inflorescences axillary unbranched, peduncles 1-1.2 cm long;
buds ?9 or 11, pedicellate, ovoid, scar absent, the single operculum
conical, stamens irregularly flexed, anthers +/-reniform, versatile,
dorsifixed, dehiscing by longitudinal slits that are ?not confluent
apically, style long and straight, stigma tapered, locules 3, the
placentae each with 2 vertical rows of ovules; flowers not seen.
Fruit not seen.
Seed not seen.
Cultivated seedling (measured at ca node 10): not grown.
Eucalyptus angularis (Latin, angularis, angular,
referring to the angled branchlets).
A mallee endemic to Western Australia and of extreme rarity, known
only from a small stand near Mt Lesueur and one on Mt Benia. The stems
are rough-barked to 1 m and the adult leaves short, glossy green,
glandular and slightly discoloured, reminiscent of the eastern stringybarks.
The plant has axillary, up to 11-flowered, inflorescences but has
not been seen in flower.
Eucalyptus angularis belongs in Eucalyptus subgenus Eucalyptus,
a group characterized by buds with a single operculum (hence no operculum
scar) and ovules arranged in 2 rows on the placenta. Little is known
of this species and its relationships within the subgenus.
Recent searches by two of the authors (AVS and JRC) were unable to
relocate the plants.