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Poa jugicola D.I.Morris

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, 30–100 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, 0.4–2 mm long, truncate or obtuse. Leaf-blades conduplicate or involute, 3.5–35 cm long, 0.3–2 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, 5–25 cm long. Panicle axis angular, scabrous. Panicle branches capillary, scabrous.

Spikelets
Spikelets solitary. Pedicels scabrous. Fertile spikelets many flowered, comprising 2–7 fertile florets, with diminished florets at the apex, oblong, laterally compressed, 4–10.2 mm long, breaking up at maturity. Spikelets disarticulating below each fertile floret. Floret callus glabrous or woolly.

Glumes
Glumes persistent, similar. Lower glume lanceolate, 2.6–3.8 mm long, 100% length of upper glume, membranous, much thinner on margins, 1-keeled, 1–3-nerved, midnerve scabrous. Lower glume lateral nerves absent or obscure. Lower glume surface smooth or asperulous. Lower glume apex acute. Upper glume lanceolate, 3–4.3 mm long, 66–90% 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–)4.3–5.1 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, 2.4–2.6 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.


Images
Illustrations available:
Inflorescence (scanned specimen)
Spikelet (photo)
Australian distribution



Inflorescence (scanned specimen)
© Queensland Herbarium
NSW 312287
by D.Sharp


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Spikelet (photo)
© Queensland Herbarium
NSW 312287
by D.Sharp


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Australian Distribution
© ABRS


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