MACLOSKIE : JUNCACEyE. 297 



c. Tepals green, acute, as long as the capsule. filiformis. 



c2. Tepals with 2 chestnut stripes. balticus. 



c$. Tepals brown-margined. leseurii. 



b2. Flowers non-braceolate, inserted in heads on branches of the inflorescence. Tepals green. 



maritimus. 



A2. Lowest leaf of inflorescence not continuing the stem. Inflorescence seeming terminal. 

 b. Leaf-blade flat or terete, not septate internally. 

 c. Flowers bracteolate, not in heads. 



d. Inflorescence terminal, flowers remote, unilateral. bufonius. 



d2. Flowers solitary in the axils, stamens 5-6. depauperattis. 



d^. Inflorescence decompound ; stamens 6. graminifolius. 



c2. Flowers in heads, not bracteolate ; fruit I -celled. 



d. Stamens 6. dombeyanus. 



d2. Stamens 3. planifolins. 



b2. Leaf-blades terete or flat, internally septate, not channeled above base. Tepals equal. 

 c. Erect, 20 cm. Cyme with i -leaved involucre, with sessile glomerules. 



microcephcdus. 



02. Low, 40 mm. Spikes in pairs. Leaves filiform. scheuchzerioides. 



b$. Leaf-blade subulate, internally septate, channeled halfway. stipularis. 



AT,. Leaf-blade semiterete, sulcate, rigid. Inflorescence depauperate, terminal ; bract thrice 



longer. chamissonis. 



A^. Leaves flat. Culm erect, compressed. Panicle lax. Annual. Tepals equal. 



cyperoides. 

 A$. Sheaths leafless. Culm compressed. Cyme lateral, diffuse. Tepals narrow, the outer 



longer. mexicanus. 



A6. Tall, 60 cm. Cyme with outer rays long. Tepals ovate, inner obtuse, outer acute. 

 Leafless. procerus. 



i. J. ACUTUS Linn. Great Sharp Sea-rush. 



Barren culms and outer bracts pungent. Panicle very compound, 

 dense ; clusters 2-4-flowered. Perianth-leaves half as long as the large, 

 broad-ovate, acuminate, glossy-brown capsule ; inner 3 with a broad 

 membranous border at the apex. 



(Eur., Brazil) ; Patagon., in salines near Carmen de Patagones. 



Panicle more contracted than in the type. 



2. J. BALTICUS Linn. 



Rhizome creeping. Culm 30-60 cm., stiff, often prickly at top, obscurely 

 striate. Pith continuous. Panicle erect, branched. Tepals subequal, 

 ovate-lanceolate, very acute, as long as the elliptical, scarcely trigonous, 

 obtuse, mucronate capsule. Stamens 6. 



(Eurasia and Amer., chiefly near the sea) ; (Argentina) ; Patagon., along 

 Rio Sta. Cruz, and Rio Chubut. 



