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Poa jugicola D.I.Morris
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Derivation
Poa L., Sp. Pl. 67 (1753); from the Greek poa (grass, especially
as fodder).
jugicola- from the Latin jugum (mountain ridge) and -cola (dweller). From the central highlands of Tasmania.
Published in
Muelleria 7: 167 (1990).
Habit
Perennial, tufted. Rhizomes elongated. Stolons present. Basal leaf sheaths pallid,
dull or glossy, glabrous or pubescent. Young shoots intravaginal. Culms erect
or geniculately ascending, slender, 30100 cm tall, 2-noded. Mid-culm internodes
terete, glabrous or pubescent. Mid-culm nodes glabrous. Lateral branches simple.
Leaves mostly basal. Leaf-sheaths glabrous on surface or puberulous or pubescent.
Ligule a fringed membrane, 0.42 mm long, truncate or obtuse. Leaf-blades
conduplicate or involute, 3.535 cm long, 0.32 mm wide, firm or flaccid.
Leaf-blade surface glabrous or pilose. Leaf-blade apex abruptly acute, hooded,
antrorsely scabrous.
Inflorescence
Inflorescence compound, a panicle. Panicle open or contracted, elliptic, 525
cm long. Panicle axis angular, scabrous. Panicle branches capillary, scabrous.
Spikelets
Spikelets solitary. Pedicels scabrous. Fertile spikelets many flowered, comprising
27 fertile florets, with diminished florets at the apex, oblong, laterally
compressed, 410.2 mm long, breaking up at maturity. Spikelets disarticulating
below each fertile floret. Floret callus glabrous or woolly.
Glumes
Glumes persistent, similar. Lower glume lanceolate, 2.63.8 mm long, 100%
length of upper glume, membranous, much thinner on margins, 1-keeled, 13-nerved,
midnerve scabrous. Lower glume lateral nerves absent or obscure. Lower glume
surface smooth or asperulous. Lower glume apex acute. Upper glume lanceolate,
34.3 mm long, 6690% of length of adjacent fertile lemma, membranous,
with hyaline margins, 1-keeled, 3-nerved, midnerve scabrous. Upper glume surface
smooth or asperulous. Upper glume apex acute.
Florets
Fertile lemma lanceolate or oblong, (3.5)4.35.1 mm long, membranous,
5-nerved. Lemma midnerve scaberulous, ciliate, hairy below. Lemma surface smooth
or scaberulous, rough above. Lemma margins ciliate, hairy below. Lemma apex
obtuse. Palea keels scabrous, adorned above. Apical sterile florets resembling
fertile though underdeveloped. Lodicules 2, membranous. Anthers 3, 2.42.6
mm long, yellow or purple. Grain with adherent pericarp. Hilum punctiform.
Continental Distribution:
Australasia.
Australian Distribution:
Tasmania: Central Highlands.
Classification. (GPWG
2001):
Pooideae: Poeae
Notes
Endemic. Among boulders or on dolerite outcrops in subalpine Nothofagus cunninghamii
forest on Quamby Bluff and the Western Tiers. Flowers Dec.Mar.
Inflorescence (scanned specimen)
© Queensland Herbarium
NSW 312287
by D.Sharp