250 



A. Barclay — Descrijdive Lid of the Uredineas 



[No. 2, 



with granialar uncoloured matter. The fresh spores measure on au 

 average 30-6 x 27-6 varying from 28/i, in diameter to 32 x 28 (jl. 



The teleutospores are long, narrow, and characteri.stically square 

 shaped (Fig. 10, PI. XIII), the free end being squarely thickened. The 

 total length of the fresh spore, when moistened, varies between 34 and 

 41 fi ; the upper cell measuring 1(3 to 20 in length, and the lower, 17 to 

 2] fj.. At the septum the breadth of the spore is 8 to 10 /j.. 



Eemarhs. — I have named this P. graminis, as I find Plowright* 

 mentions the same host as bearing this species, although the measure- 

 ments of my teleutospores are smaller than those given by him. The 

 Berberry secidium, as I have already noted, is very common in Simla. 



23. PUCCINIA OaEICIS PILICINJ!, nov. sp. 

 on Oarex filicina, Nees. 



This is not a common fungus, and is usually very inconspicuous, 

 bearing very minute circular teleutospore beds (resembling in this re- 

 spect the same beds of P. caricis on Carex setigera, which, though small, 

 are yet considerably larger than those on Carex filicina). Only a few 

 minute spore beds are usually formed on each leaf, and always on the 

 lower surface. Spore beds are also occasionally formed on the sheath. 

 I have not seen any uredo pustules on this plant. 



The teleutospores are borne on long stalks, and are firmly adherent. 

 They are brown, much constricted at the septum, and thickened at the 

 free ends (Fig. 1, PL XI II) . When freshly gathered and moistened, a re- 

 presentative spore measured 44 /x in total length, of which 24 /w, be- 

 longed to the upper cell, and 20 to the lower. The breadth at the 

 septum was 12^, and the apical thickening was 8 in depth. These 

 spores gei-minate freely in spring in water, after a winter's rest. The 

 promycelium of the upper cell emerges from the apex, through a pore 

 which is clearly visible before germination, and that of the lower, from 

 a point near the septum. Each promycelium usually produces four 

 sporidia in the usual way (Fig. 2, PL XIII) . The sporidia are oval, some- 

 what more pointed at the attached end than at the free end, and 

 measure 9 x 6 to 12 x 6 /x. These sporidia usually emit a germ 

 tube from the side, and not from either end. 



Eemarhs.— 1 frequently placed these teleutospores on leaves of 

 Urticaparviflora, Roxb., but the well known ^TJeidmm Urticiv, Schum, was 

 never produced. It is therefore certainly distinct from P. Oariois, 

 Schum. The characters of P. limoscv, Magnus, and P. silvatica, Sohroter, 

 do not agree with those above described. 



The former is connected with an JEcidium on LysimacUa, and we 

 * Bi-itiah Vredinm and UstUa<jin<ia.; Plowright, Kccgau, Panl, Trouck & Co., 1839. 



