KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 55. NIO 5. 81 



The peduncle, thus, exhibits a great difference from the other allied species in 

 the more scattered arrangement of numerous vascular bundles and in the appearance 

 of a few bast-bundles beside the here also present subepidermal strands. The length 

 of the peduncle is usually 3 — 4 cm or about the same as that of the internode 

 next beneath. 



The leaf-base never tapers into a stalk, but is more or less broad and occupied 

 by the lacunar part. From the middle the width of the leaf gradually narrow into a 

 very elongated apex. The leaves are often somewhat asymmetrical and falcately 

 curved to either side. The lacunar part of the leaf usually occupies the whole 

 space between the two principal side-nerves from the middle to the base of the leaf. 

 From the middle and upwards the number of the lacunae decreases so that the very 

 top has none. In the lacunar part the leaf has a full number of thin subepidermal 

 strands both in the upper and lower surface. Such strands occur also at short in- 

 tervals quite to the borders. The very border-sclerenchyma is extremely strong, usually 

 consisting of about 75 cells each (see fig. 31 Af). The front-field of the ligules 

 12— 13-fibrous. 



No varieties of this and the next following species have at present been found. 



Distribution. Brazil, S. Paulo, Minas Geraes, 47, Widegren and others 

 (hb. Stockholm, et Uppsal.); Lagoa Santa, Warming (hb. Stockholm.). 



P. pseudopolygonus n. sp. 



Caulis compressus, ± ramosus, internodiis brevibus, 10 — 20 (30) mm longis. 

 Folia linearia, basi rotundata, apice ± abrupte cuspidata modo fere P. Berteroani 

 (fig. 46, B), caulina ca. 110x6—7 mm, multinervia ut in P. polygoni (fig. 31, A), 

 nervis lateralibus principalibus ternis, secundum nervum medium usque ad apicem 

 late lacunosa fere ut in fig. 53, A ; ramea minora, 5-nervia. Ligulce apice rotundata?, 

 fissse, 11 — 15-nervise, ca. 15 mm longa?. 



The specimens examined are collected in Uruguay, Cuarein, 01, by B. Berro, 

 (n:r 1564, hb. Haun.) and lack spikes. Possibly they may be of a hybrid origin or 

 only a variety of P. polygonus. I have herewith wished to call attention to an 

 interesting plant, which should be looked for and further studied. 



The anatomy of the stem and leaves answers much to that of P. polygonus, 

 but the central cylinder exhibits an evident prototypic arrangement of the median 

 bundles, and this fact has caused me to distribute the plant as a distinct species. 



P. Ulei Schumann. 



Flora brasiliensis III. 3, 1894, 690. — Fig. 31. 



This plant can easily be confounded with the precedent species. However, it 

 is, even in its barren state, well distinguished from them. The stem is terete and its 

 structure rather different. The epidermis-cells are shorter, the interlacunar strands 



K. Sv. Vet. Akad. Handl. Band 55. N:o 5. 11 



