JUNCACEAE 281 
FaAwiLy 2. JUNCACEAE — Rusu FAMILY 
nnial or sometimes annual herbs, usually grass-like in habit. 
a 
Leaves with flat blades, or terete. Flowers scattered along the inflores- 
cence-bra or in dense heads. Perianth inconspicuous, whitish, green, 
yellowish, or brownish. Calyx of 3 chaff Is. Corolla of 3 petals 
nearly or quite similar to the sepals. Androeciu 6, or rarely 
or 5 stamens. Gynoecium 3-earpellary. Ovary 1-3-eelled. Fruit a loculi- 
cidal capsule, or opening irregularly. Seeds sometimes appen — 
Eight genera and about 300 species, of wide geographie distribution. 
Leaf-sheaths open: capsule 1- or 3-celled with axial or parietal pecu seeds 
many. UNCUS 
Leaf-sheaths closed’: capsule 1- celled with basal placentae: seeds 3. . 93 UNCOIDES. 
1. JUNCUS [Tourn] L. Glabrous or merely scabrous herbs. Leaves 
terete or with flat but thick Dingen Braets subtending the flowers, mostly en- 
tire.—About 215 species, most abundant in the Northern Hemisphere.—Spr.— 
fall, or all year S.—RUSHES. 
Abs bract of the inflorescence terete, not markedly channeled, Pa appearing like 
continuation of the scape, the inflorescence thus appearin 
i: Aa 1. I. EFFUSI. 
Lower bract of the infloreseence not appearing like a continua- 
tion of the oe the inflorescence therefore usually appear- 
ing Forma 
Leaf-blades with their flat surface facing the stem, ie terete 
-or channeled, not provided with node-like sep 
Flowers bracteolate, borne singly on the inflorescence: 
branches, or someti imes clustered, but never capitate. II. BUFONII. 
Flowers not bracteolate, capitate on the inflorescence- 
branches. III. MARGINATI. 
T either terete and not flattened, or flattened or 
pressed, with the fiat aa not facing the stem, 
hollbw and provided wit 
Leaf-blades terete, the pith Bertorated with slender tubes: 
clusters of the inflorescence reduced to a single flower 
- 
a 
ABORTIVI. 
Leaf-blades either terete, hollow, and with node-like septa, 
ened or compressed or both: clusters of the 
in inflorescence few-many-flowered. 
Stamens 6, one facing each sepal and each petal. | V. ARTICULATI. 
Stamens 3, one facing each sepal. . ACUMINATI. 
4 
lam 
I. ErrFUS 
id ee borne singly on the phere of the in- 
e 
Stame ur» als and petals about as long as the capsule: 
rim AUN. or acuminate: capsule of an obovoid type. 1. J. effusus. 
Stamens 6: sepals and petals about 14 as long as the cap- 
sule: petals obtuse: capsule of an ovoid type. 2. J. gymnocarpus. 
Flowers not bracteolate, borne in heads on the branches of . 
the inflorescence. 3. J. Roemerianus. 
II. BUFONII 
Leaf-blades flat, but sometimes involute in drying so as to ap- 
ear terete. (See also J: dichotomus below.) 
Plant annual: inflorescence, exclusive of its ‘bracts, more 
than one- third bs AEIR of the plant: anthers shorter 
than the filam 4. J. bufonius. 
times in J. Coa. and the anthers then longer 
than oA filaments 
Inflorescence i-3-flowered: leaves with fimbriate au-  . . 
ricles. 5. J. trifidus. 
aie several-many-flowered : leaves with entire 
ricles. 
Plant caulescent : sepals and petals obtuse. 6. J. Gerardi. 
Plant scapose : sepals and petals acute or acuminate. 
