Entolasia marginata (R.Br.) Hughes

bordered panic grass


Info

Subfamily: Panicoideae
Genus etymology: Entolasia = "within hairy" [Greek] refring to the hairy lemma hidden under the sterile lemma
Species etymology: marginata = "border possessing" [Latin] refering to the white margin of the leaves
Photosynthetic type: C3 (cool season)
Nativity: naturalized - intentional
First recorded in Hawaiʻi: 1995

Map

 Distribution of Entolasia marginata in Hawaiʻi.

Inflorescence

Entolasia marginata Inflorescence
Entolasia marginata Inflorescence
Entolasia marginata Inflorescence
Entolasia marginata Inflorescence
Entolasia marginata Inflorescence
Entolasia marginata Inflorescence

Plant

Entolasia marginata Plant
Entolasia marginata Plant
Entolasia marginata Plant
Entolasia marginata Plant

Habit

Entolasia marginata Habit

Spikelets

Entolasia marginata Spikelets
Entolasia marginata Spikelets
Entolasia marginata Spikelets
Entolasia marginata Spikelets

Description

Habit: Perennial. Rhizomes short. Butt sheaths pilose. Culms geniculately ascending, or decumbent, or rambling; 20-60(-200) cm long; wiry; 4-10 -noded; without nodal roots, or rooting from lower nodes. Culm-internodes scaberulous; distally glabrous, or hirsute; with tubercle-based hairs. Culm-nodes glabrous, or pubescent. Ligule a fringe of hairs. Leaf-blades linear, or lanceolate; flat; 3-20 cm long; 2-15 mm wide. Leaf-blade midrib evident. Leaf-blade surface scabrous; glabrous, or hirsute; sparsely hairy; with tubercle-based hairs. Leaf-blade margins cartilaginous; ciliate; hairy at base. Leaf-blade apex attenuate; simple. Inflorescences: Inflorescence composed of racemes. Racemes 3-10; borne along a central axis; erect; unilateral; 1-12 cm long; bearing 2-12 fertile spikelets on each (secondary); simple, or secondarily branched. Central inflorescence axis 4-20 cm long. Rhachis angular; scaberulous on margins. Spikelet packing adaxial; regular; 2 -rowed. Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear; flattened. Spikelets: Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; acute, or acuminate; 2.5-3.8 mm long; falling entire. Fertile Spikelets: Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; acute, or acuminate; 2.5-3.8 mm long; falling entire. Glumes: Glumes dissimilar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 0.5-1 mm long; 0.2-0.25 length of spikelet; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 2.5-3.8 mm long; 1 length of adjacent fertile lemma; 1 length of spikelet; herbaceous; without keels; 5 -veined. Upper glume apex acute. Flowers: Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; ovate; 2.5-3.8 mm long; 1 length of spikelet; herbaceous; 5 -veined; acute. Fertile lemma elliptic; dorsally compressed; 2-3 mm long; coriaceous; without keel; 5 -veined. Lemma lateral veins obscure. Lemma surface pubescent; hairy all along. Lemma margins involute. Lemma apex acute. Palea involute; coriaceous; 2 -veined. Palea surface pubescent. Distribution: Asia-tropical: Papuasia. Australasia: Australia and New Zealand. Pacific: north-central.
(Description source: Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora. Available at https://powo.science.kew.org )