SEDGE FAMILY 



199 



Eefs. SCIBPUS CERNUUS Vahl, Enum. PI. 2:245 (1806), type loe. western part of the 

 Spanish peninsula. S. riparius Spreng. Syst. 1:208 (1825). Isolepis riparia R. Br. Prodr. Fl. 

 N. Holl. 1:222 (1810), type loc. Port Jackson, Australia. 



2. S. carinatus Gray. DWARF CLUB-RUSH. Stems tufted, slender, triangu- 

 lar, 1 to 2 inches high, shortly leaved at base ; involucral bract 4 to 9 lines long ; 

 spikelet solitary, ovate, l 1 /^ to 2 or 3 lines long; scales strongly keeled, acute, 

 2 to 3-nerved on the sides, the midrib excurrent as a short beak ; achene strongly 

 triangular, globose in outline, light-brown, % line long, obscurely short-necked 

 at base. 



Swamps and low spots near the coast from Mendocino Co. to San Diego Co. 



Locs. Mendocino City, Bolander 4757; San Francisco, Bolander; Del Monte, Heller 6771. 



Kef 9. SCIRPUS CARINATUS Gray, Proe. Am. Aead. 7:392 (1867). Isolepis carinata H. & 

 A.; Torr. Ann. Lye. N. Y. 3:349 (1836), based on spms. from New Orleans, Drummond, and 

 the Arkansas River, Nuttall. 



S. NANUS Spreng. Pug. 1:4 (1813), type loc. Mansfeld, Germany. Eleocharis pygmaca 

 Torr. Ann. Lye. N. Y. 3:313 (1836). Stems capillary, flattened and grooved, 1 to 1% inches 

 high; roots with minute tubers; involucral bract present; spikelet 2 to 4 (or 8) -flowered, 

 greenish; scales ovate; bristles longer than the achene, often wanting; achene obovate, tri- 

 angular, smooth and shining. Brackish shores or salt marshes, widely distributed throughout 

 Xorth America, Europe, north Africa. Occurs in Oregon and Washington (Piper and Beattie, 

 Fl. Nw. Coast, 84). California material has been referred here (Cucamonga, ace. Pac. R. Rep. 

 4:152; Honey Lake Valley, Davy 3290), but the specimens are too young for certain deter- 

 mination. 



3. S. pauciflorus Lightf. (Fig. 18.) Stems striate, 3-angled, leafless, slightly 

 tufted, very slender (2^/2 to 4^ inches high), from slender rootstocks; spikelet 



solitary, terminal, 2 to 3 lines long, without 

 involucral bracts, few (about 3) -flowered; 

 scales narrow-ovate, obtusish; bristles 2 to 6, 

 as long as the achene or longer ; stamens 3 ; 

 style 3-cleft; achene obovoid-oblong, rather 

 strongly beaked. 



San Jacinto Mts. to the Sierra Nevada. 

 Oregon to British Columbia, east to Maine. 

 Europe, Asia. 



Locs. Round Valley, Mt. San Jacinto, C. M. 

 Wilder 928; upper Santa Ana Canon, San Bernar- 

 dino Mts., Hall 7608; Bonita Mdw., Tulare Co., Hall 

 $ Babcock 5181; Truckee ranger station, L. 8. Smith 

 694. 



Ref. SCIRPUS PAUCIFLORUS Lightf. Fl. Scot. 1078 

 (1777), type loc. Highlands of Scotland. 



4. S. setaceus L. Stems caespitose, 4 to 5 inches high, twice as high as the 

 leaves, the horizontal rootstocks very slender ; involucral bracts 2 to 4 lines long ; 

 spikelets 1 or 2 in a place, narrow-ovate, iy 2 lines long ; scales more or less dark 

 brown with a broad green midvein ; achenes elliptic-obovoid, 1/2 line long, flattish 

 on one side, convex and somewhat angled on the other, longitudinally and rather 

 regularly ribbed, finely and horizontally striate between the ribs, apiculate. 



Moist places, Humboldt Co. Europe, Asia, Africa, Australia. 

 Loc. Salmon Creek Valley, Tracy 4817 (det. M. L. Fernald). 



Ref. SCIRPUS SETACEUS L. Sp. PI. 49 (1753), type European. 



f 



5. S. nevadensis Wats.- Stems clustered from a creeping rootstock, 9 to 18 

 inches high ; leaves % to % height of the stems, % to % line wide, channeled, 

 involute; spikelets chestnut-brown, oblong-ovate, 4 to 10 lines long, 3 or 4 ("to 



Fig. 18. SCIRPUS PAUCIFLORUS Lightf. 

 a, spikelet, X 5; b, achene, X 16. 



