T. Holm — Studies in the Cyperacea. 317 



California: Lagoon at Sebastopol, Sonoma County, collected 

 by Mr. A. A. Heller (No. 5797), and in a marsh at Berkeley, 

 collected by Mr. J. Burtt Davy. The species is nearest related 

 to C. magnified Dew., but is readily distinguished by the lighter 

 color of the spikes and the very dense and regular arrangement 

 of the pistillate flowers. 



Car ex siderosticta Hance. 



We have placed this as a member of the Lejochlcence, and it 

 is interesting to see that in addition to the shape of the perigy- 

 nium, the species agrees, also, by its monopodial rhizome and 

 long-sheathed bracts, with the central forms: C. laxifiora, 

 Careyana, etc. Otherwise the lateral spikes are all androgy- 

 nous, a character which we do not think is sufficient for the 

 segregation of the species from the Carices genuince. 



It is somewhat remarkable that the rhizome is rather slender, 

 creeping and stolon if ero us, while most of the monopodial 

 Carices have a short, caespitose rhizome. 



Car ex cryptoslachys Brongt. 



As already stated by Boott, this must be referred to the 

 Daetylostachyce, and it possesses the same monopodial rhizome 

 as is observable in C. digitata for instance; the structure of 

 the perigynium is much the same, but the ramified culms with 

 quite numerous, androgynous spikes, makes the species appear 

 as the most evolute type of the section. 



Carex physochlaina sp. n. 



Rhizome loosely csespitose with persisting purplish leaf- 

 sheaths; leaves much shorter than the culm, very narrow, but 

 flat, scabrous; culms from 30 to 42 cm in height, erect, slender, 

 but stiff, trigonous, scabrous, only leafy at the base, phyllopo- 

 dic; spikes two to three, the terminal staminate, the lateral 

 pistillate, mostly contiguous, sessile, erect, very thick and 

 dense-flowered, subtended by short, filiform, sheathless bracts, 

 the lowest one spreading and about as long as the spike ; 

 scale of staminate flower obovate-oblong, obtuse, purplish with 

 green mid vein and pale margins ; scale of pistillate flower ovate, 

 obtuse, deep purplish to almost black with the mid vein obsolete, 

 shorter than the perigynium ; perigynium sessile, spreading, 

 oval to oblong, inflated, glabrous, faintly nerved, purplish 

 above, yellowish below, the beak short, bidentate; stigmata 

 three, the style flexuose within the perigynium. 



Collected on Coal Creek hill, near the Yukon River, by Mr. 

 Fr. Funston (No. 139). 



Very distinct by the heavy, dark spikes contrasting the 

 slender culm and narrow leaves : its nearest ally is C. physo- 

 carpa. 



Brookland, D. C, October, 1903. 



Am. Jour. Scl— Fourth Series, Vol. XYII, No. 100.— April, 1904. 

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