■30 /ournal uj Mycology [Vol. 13 



SPIRECHINA Arthur sp. nov. 



Cycle of development imperfectly known ; only uredinia and 

 telia recognized, both subepidermal, but judging from analogy 

 also possessing subcuticular pycnia. 



Uredinia erumpent, definite, without peridium or paraphyses ; 

 urediniospores borne singly on pedicels, ellipsoid, wall nearly 

 colorless, echinulate-verrucose, pores obscure ; contents colored. 



Telia erumpent, definite, without peridium or paraphyses ; 

 teliospores borne singly on pedicels, obovate, one-celled, wall 

 nearly or quite colorless, smooth, pore apical. 



Spirechina Loeseneriana (P. Henn.) Arthur nom. nov. 



Uredo Loeseneriana P. Henn. Hedwigia 37:273, 1898. 

 O. Pycnia unknown. 



II. Uredinia amphigenous, often forming firm, more or less 

 globular excrescences 3-20 mm. across, pulvinate, soon naked, 

 pulverulent, bright orange-yellow fading to pale yellow, some- 

 times confluent, ruptured epidermis noticeable; urediniospores 

 ellipsoid or obovate-oblong, 16-26 x 19- 40ju,; wall pale yellow, 

 1.5-2.5/^ thick, thicker above, 3-5iu., echinulate-verrucose with 

 ratlier fine tubercles closely set in spiral rows 2-31U, apart, pores 

 obscure. 



III. Telia chiefly hypophyllous, scattered, small, 0.1-0.2 

 mm. across, soon naked, pulverulent, becoming pale yellow or 

 whitish, ruptured epidermis not noticeable ; teliospores narrowly 

 obovate or oblong, 16-19 x 42-48/^, usually germinating upon 

 maturity; w-all nearly or quite colorless, i-i.^p- thick, thicker 

 above, 3-5^1/., smooth ; pedicel colorless, short. 



On Rubiis Bogoteitsis H. B. K. Yungas, Bolivia, 1890, A. 

 Miguel Bang 684 (type).; Riihus sp., St. Catharine, Serra Geral, 

 Brazil, January, 1891, E. Ule 16 j6: Jalambohoch, Dept. of Hue- 

 huetenango, Guatemala, August 22, 1896, C. & E. Selcr, 268/ 

 (type of Uredo Loeseneriana) . The type specimen from South 

 America was detected by the writer in tbe phanerogamic collec- 

 tion of the Field Museum in Chicago, upon sheet no. 77528. The 

 spiral markings of the urediniospores naturally suggest the simi- 

 lar markings on the urediniospores of Pileolaria. The teliospores 

 are in both cases one-celled. Yet these resemblances are doubtless 

 superficial, and while they would consign both genera to the 

 genus Uromyces, under the old system of single characters, the 

 genus Pileolaria clearly shows affinities in the direction of Ra- 

 Z'enelia, while Spirechina is closely related to Knehneola, its chief 

 diflPerence being the one-celled teliospores. The generic name is 

 taken from the Greek for spiral and prickly husk. 



