Cyperus. | "CYPERACEAE. 465 
the upper ones gradually shorter; these again (particularly the lower ones) 
vedere into alternate branchlets which are closely spicate or racemose 
patent ovate-oblong turgid spikelets. Jumes roundish, concave, 
deen nervose, whitish. — Has oat points in common with C. Monti 
The leaves resemble those of some of the larger species of Carex.» 
Oahu or Niihau (Lay and Collie). 
. C. trachysanthus, Hook. ¢ Arn. in Bot. Beech. p. 99. — Stem 1—2 ft. 
he, obtusely psa grooved on the faces, smooth or eecnrhetre ety 
umbel. Leaves pale, glossy, about as long as the 
on eer ia keeled, generally biaat scene ee shiksts 
aculeolate along the margins and keel. Umbel ial or compound, with 
4—5 projecting rays besides the sessile clusters, the longest ray 2—3’, 
each bearing at its very apex a cluster of 12—25 spikelets or an umbellet 
of about 8 radioles which terminate with clusters of spikelets. Two or 
three involucral leaves much longer than their rays, those of the involucel 
short filiform and few. Spikelets broad oblong, much compressed, 4—6“ 
long, 2—2'/2 broad, 10—16-flowered. Glumes gaping, quite discreet in 
fruit, 2 long, broad ovate, carinate-navicular, hooded below the sharp- 
pointed recurved apex, peinorsansouk. grayish-fawn, faintly many-(9—11-) 
herved without prominent rib, the keel distinctly serrulate below the beth 
Rhachis slender, very narrowly margined, the shallow foveoles Path /s the 
length of the glumes. Stamens 3. Style deeply 3-cleft. , half 
as long as its glume, obovoid or pyriform, trigonal, apiculate, ee with 
a film of grayish (waxy) exudation. -— Bcklr. in Linnaea, XXXV, 548. 
* sired rPieesteand Schrad. in herb. Berolin. — C. viscosus, Mann. 
Enum. no. 504 
ASG on lava rocks of the eastern end near Cape Mokapuu. Collected first by Cha- 
misso. All my specimens answer to the description given above, but Hook. & Arn. had 
pa ges stem wea from all asperities. In stir and color the spikelets are much like 
C. pennatus. The leaves are described as glutinous by Boeckeler, but in m 
Bictiicks they preeer simply goa 
8. C. auriculatus, Nees. — Kunth, 1. c. p. 83. — Stem 2—3 ft. high, 
about 8 rays exserted, 3—8’ long and again umbellate at their tops with 
8 secondary rays, which are sheathed with closed ochreoles, spicate in 
their upper halves and the longer ones again branching at the middle. 
Involucral leaves two to three times the length of the umbel, those of the 
involucel a little longer or shorter than their umbellets. Spikelets with 
ate bracteole of about 1”, dase: linear-terete, acute, rather 
. flexuose, 5—12” long, with glumes gaping, pale nut-brown. Glumes 8—20, 
Hillebrand, Flora of the Hawaiian Islands 30 
