290 CENTROLEPIDACEAE. [Gammardia. 
Norra Isnanp: Base of Ruapehu, Petrie! T. F. C., Cockayne; Kaimanawa 
Mountains, B. C. Aston; Tararua Mountains, Petrie. SoutH IsLanp: Common in 
subalpine bogs throughout. STEWART ISLAND, AUCKLAND AND CAMPBELL ISLANDS: 
Abundant in boggy places in open situations. Usually from 2000 to 5000 ft., but 
descends to sea-level in Stewart Island and in the Sunbantarctic islands. Var. ligulata : 
Stewart Island, near Fraser Peaks. 
Family XVIII. JUNCACEAE. 
Perennial, rarely annual herbs. Rootstock short, stout, scaly. Stems 
usually simple, slender, stiff, erect, cylindrical or compressed, sometimes 
septate within. Leaves usually all radical, often rigid and terete like the 
stems, sometimes flat and grassy, occasionally absent or reduced to sheaths. 
Flowers small, green or brown, regular, hermaphrodite or more rarely 
unisexual, in axillary or terminal cymes or clusters, rarely solitary. 
Perianth inferior, coriaceous or scarious, persistent ; segments 6 in 2 series, 
imbricate. Stamens usually 6, inserted on the bases of the perianth- 
segments, the 3 interior sometimes wanting; filaments free, flattened or 
filiform ; anthers 2-celled, introrse. Ovary superior, 1-celled or 3-celled ; 
style short or long; stigmas 3, filiform; ovules few or many, anatropous. 
Fruit a 1- or 3-celled capsule, loculicidally 3-valved. Seeds few or many, 
erect ; testa membranous, often lax at each end ; albumen copious, fleshy ; 
embryo minute. | 
If restricted to the true Junceac, this is a family of moderate size, comprising 7 
or 8 genera and abort 280 species. The two typical genera (Juncus and Luzula) are 
widely dispersed, especially in temperate and extratropical regions. The species have 
no important properties, and cannot be said to possess any economic value. 
Glabrous. Flower solitary. Ovary l-celled, ovules many. Style 
long 
S ne 5f er - ]. ROSTKOVIA. 
Glabrous. Flowers several or numerous. Ovary often 3-celled, 
ovules many. Style short so tye 2. JUNCUS. 
Hairy. Flowers several or numerous. Ovary }-celled, ovules 3. 
Style short she : 3. LuyuLa. 
See pre. Thin. ISa 2 RIS, 
1. ROSTKOVIA Desv. 180% 
Densely tufted perennial herbs. Rhizome short, horizontal, branched. 
Stems crowded on the rhizome, strict, erect, terete. Leaves 1 or more, 
together with several sheathing scales at the base of the stem. Flowers 
large, solitary, terminal; bracts at the base 1-3, the lowest one sometimes 
foliaceous. Perianth-segments 6, glumaceous, distinct, linear-subulate or 
linear-lanceolate, erect, rigid; margins often scarious. Stamens 6; fila- 
ments very short; anthers linear, erect, basifixed. Ovary sessile, 1-celled, 
with 3 parietal placentas; style stout, subulate, divided above into 9 
linear stigmas; ovules numerous, anatropous. Seeds small; testa appen-— 
diculate or not; embryo very small, included in the base of the fleshy 
albumen. 
A small genus of 4 species confined to New Zealand and antarctic South America. 
Flowers { in. long, exceeded by a foliaceous bract. Capsule longer 
than the perianth. Seeds not tailed = 
Flowers jin. long; bract very short. Capsule not more than $ ie 
as long as the perianth. Seeds tailed a +f .. 2 R. gracilis. 
1. R. magellanica. 
