CYPERACE^. (sedge FAMILY.) 559 



* * Nut reticulated : dish of 5 flattened lobes: stamens 2. 



3. S. reticularis, Michx. Culms slender (1'^- l|-° high), scabrous be- 

 low; leaves narrowly linear; spikes clustered, axillary and terminal, the 

 lateral ones on a short erect peduncle ; nut globose, small, reticulated and 

 pitted ; lobes of the disk appressed to the base of the nut. — Margins of ponds, 

 Florida and northward. August -Sept. 



4. S. Torreyana, Walpers. Culms weak, rough on the angles ; leaves 

 linear, obtuse ; spikes separate, the axillary ones on a long and drooping 

 peduncle ; nut globose, wrinkled and somewhat hairy, obscurely pitted ; lobes 

 of the disk appressed to the nut. — Damp pine barrens, Florida, and north- 

 ward. August-Oct. — Culms \°-\^° long. Nut l|"-2" in diameter. 



* * * Nut wartif : disk bearing 3-6 globular lobes : stamens 3. 



5. S. Ciliata, Michx. Culms slender, rigid (l|°-2^ high), smooth below, 

 sparingly fringed on the angles above; leaves 2, narrowly linear (1" wide), 

 rigid, smooth, or with scattered hairs on the margins ; sheatlis pul)escent ; 

 clusters terminal ; sterile spikes large, many-flowered ; nut globose, pointed, 

 closely beset with unequal warts, these corresponding to the angles of the nut 

 and at the base larger than the rest ; lobes of the disk 3, globular, entire. — 

 Dry pine barrens. Florida to South Carolina. June -August. — Khizoma 

 thick and creeping. 



6. S. Elliottii, Chapm. Culms stout (i°-l° high), densely rough- 

 fringed on the angles throughout ; leaves 3-4, broadly linear (2"- 3" wide), 

 closely fringed on the margins and midrib beneath ; sheaths pubescent ; clus- 

 ters 2, the lateral one remote, on a short erect peduncle ; sterile spike small, 

 few-flowered ; nut globose, deeply wrinkled or pitted, and with slender warty 

 projections at the base; lobes of the disk 3, globose, 2-lobed. (S. hirtella, 

 Ell.) — Low pine barrens, Florida to North Carolina. July. 



7. S. pauciflora, Muhl. Smoothish or hairy or villous throughout ; 

 culms (6'- 12' high) slender; leaves narrowly linear; clusters small, of 1 -few 

 spikes, terminal, and also a remote axillary one on a short erect peduncle ; 

 sterile spike few-flowered; nut globose (small), pointed, closely beset with 

 minute warts, these at the base elongated ; lobes of the disk 6, distinct, globose. 

 (S. Caroliniana, Willd., the villous form.) 



Var. glabra. Smooth throughout, or the leaves and bracts scabrous at 

 the summit; culms erect (1° high), rigid, but slender, like the erect leaves; 

 clusters terminal ; spikes many-flowered ; lobes of the disk 3, each 2-lobed. 

 This also varies, with longer (2°-2|°) diffuse culms, and with 1-2 distant 

 axillary clusters on long (5'- 10') drooping peduncles. — Low sandy pine 

 barrens, Florida, and northward ; the varieties chiefly southward. May - 

 August. 



§ 2. Hypoporum. — Disk none: nut concave and often pitted at the sides of 

 the triangalar base. 



* Clusters of spikes terminal, leafg-bracted. 



8. S. Baldwinii, Torr. Culms rough above (2°-3° high) ; leaves mostly 

 2, linear, rigid ; nut large (2" long) dull white, globose-ovate, obscurely angled, 



