In external habitus, Carex displodens nov. spec, somewhat resembles Carex capil- 

 laris, but is, for the rest, in so far characterized by its minute, broadly fusiform, straight, 

 completely beakless, narrow perigynia, being always burst by the ripe nut that it can 

 hardly be confounded with any other species. 



Collected on the Abakan Steppe, near Ust Kamuishto, especially in moist, loamy 

 and saliferous soil, together with various halophilous plants, as Glaux marilima subspec. 

 pedunculata, Plantago marilima subspec. ciliala, Ranunculus plantaginifolius, Lepidium 

 crassifolia, Primula longiscapa, and others. 



In flower and with ripe fruits in the second half of June. 



Carex atro-fusca Schkuhr, Riedgr. I (1801) p. 106. 



subspec. coriophora (Fischer) Kiikenth. Cyper.-Caricoid. H. 38 (IV, 20, 1909) p. 

 554; Kiikenth. Cyper. Sibir. in ^eRqeiiKO, Max. $.i. Ciio. II (1912) p. 150. Carex uslulaia 

 var. /S Trev. in Ledeb. Fl. Ross. IV, p. 295. Carex ustulata y C. A. Meyer in Ledeb. Fl. 

 Alt. IV, p. 233. Carex uslulaia var. Turczan. Cat. Baical. no. 1263. [Tab. II, Fig. 1]. 



This subspecies is especially characterized by its short and thick spikes, of a pallid 

 yellowish brown colour. The culms are erect, from 30 to 40 cm. high. The leaves 

 are flat, comparatively broad and short, 

 to 6 mm. broad, of a greyish green 

 colour, rough at the margin and along 

 the nerves underneath, from Va to K 

 of the length of the culms. The number 

 of the spikes to 7, nearly ovoid, on 

 capillaceous, relaxed stalks, from 1 to 

 2 cm. long. The upper spike is com- 

 monly wholly staminate, or, at times, 

 with some few pistillate flowers at the 

 summit. The pistillate spikes are com- 

 paratively short and obtuse, broadly 

 obovate, to 1,5 cm. long. The glumes 

 are ovate-lanceolate, subacute, 3 mm. 

 long, 1 mm. broad, mostly broadest 

 above the middle, not distinctly sca- 

 rious-margined, of a shining yellowish 

 brown colour, with a greenish midrib, 

 reaching the summit of the glume. The 

 perigynia are rather broadly oval, 

 inflated, from 3,5 to 4 mm. long, and 



2,5 mm. broad, longer and broader than the glume, nerveless, slightly trigonous below, 

 compressed above, of a yellowish brown colour, with greenish margins, nearly hyaline, 

 slightly rough along the margin in the upper part, furnished above with a short scarious- 

 margined, truncate beak. The nut is long-stalked. 



Fig. 78. Carex alro-fusca Schkuhr subsijcc. corio- 

 phora (Fischer) Kukenth. (iVi). a. Pistillate flower; 

 tlie perigynium is rather transparent, and the long- 

 stalked achene may be seen through. — b. Perigy- 

 nium with the glume. — c. Glume. 



155 



