Ichnanthus pallens

Ichnanthus pallens (Sw.) Munro ex Benth.
Flora Hongkongensis 414. 1861.

Classification. (GPWG 2001) : Subfamily
Panicoideae. Paniceae.

Basionym and/or
Replacement Name:
 Panicum pallens
Sw., Prodr. 23 (1788).

Type of Basionym or
Protologue Information
: LT: O.P. Swartz s.n., Jamaica
(M; ILT: BM, G, S, US-2489445 (fragm. ex M), US-2489446 (fragm. ex S)). LT
designated by Stieber, Syst. Bot. 12: 203 (1987).

Recent synonyms:
I. vicinus.

Key references
(books and floras):
[1969] E.E.Henty, Manual Grasses New Guinea
(111 as I. vicinus), [2002] D.Sharp & B.K.Simon, AusGrass,
Grasses of Australia

Perennial. Stolons present. Culms prostrate, 10–60 cm tall. Ligule a fringed
membrane, a ciliolate membrane, 0.9–1.1 mm long. Leaf-blades lanceolate, 2–11
cm long, 5–25 mm wide.

Inflorescence compound, a panicle of racemes. Panicle oblong, 5–15 cm long,
contracted about primary branches and contracted about secondary branches.
Racemes 3–7.5 cm long.

Spikelets pedicelled, 2 in the cluster. Fertile spikelets 2-flowered, the lower
floret barren (rarely male), the upper fertile, comprising 1 basal sterile
florets, comprising 1 fertile floret(s), without rachilla extension,
lanceolate, laterally compressed, 4–5.6 mm long. Rhachilla internodes elongated
below proximal fertile floret.

Glumes. Glumes
similar, thinner than fertile lemma. Lower glume lanceolate, herbaceous,
keeled, 1-keeled, 5 -nerved. Upper glume elliptic, 3.8–4.9 mm long, herbaceous,
keeled, 1-keeled, 5–7 -nerved. Florets. Basal sterile florets 1, barren,
with palea. Lemma of lower sterile floret 100 % of length of spikelet,
1-keeled, 5–7 -nerved.

Fertile lemma 2–2.8 mm
long, without keel. Lemma apex muticous. Lodicules present. Anthers 3.

: Africa, Temperate Asia, Tropical Asia, Australasia, North
America, and South America.

: Queensland.

Cook, North Kennedy.

A member of the section Foveolatus which is characterized by two small
areas of sclerified tissue at the base of the upper lemma, a curved stipe and
the presence of rosette clusters at the palea apex.

Native to the Old
World, it is a trailing forest grass which is widely distributed in the tropics
of Asia. In tropical and subtropical rain
forests. Occasionally collected in the tropical rainforests of Qld. Flowers

AVH 2011


Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith