KUNGL. SV. VET. AKADEMIENS HANDLINGAE. BAND 55- N:0 5. 



161 



P. badioviritlis n. sp. 



Gaulis teres crassus simplex, internodiis 30 mm 

 longis vel ultra. Folia inferiora subcoriacea ovalia ± 

 longe petiolata multinervia caduca, superiora coriacea 

 tenuia oblonga basi rotundata apice rotundata vel obtuse 

 subcuspidata ± 21-nervia, 80 — 85 X 35 — 40 mm, petiolata 

 petiolis longis (± 100 mm). Ligulce 80 mm longas bicari- 

 nata3 badiovirides. Spicse non evolutte. Anatomia caulis: 

 vide infra! 



Stem stout, 3 — 4 mm in diam., for the rest of about 

 the habit of P. rotundatus or stenostachys. From these, 

 however, it is well distinguished by the above given charac- 

 ters and the anatomic stem diagram. Especially significant 

 are the long ligules and the broad lower leaves of subco- 

 riaceous structure. Nor can it be intermingled with P. 

 linguatus, otherwise of the same distribution, which has 

 true membranous submersed leaves with shorter ligules 

 and richly developed subepidermal bast bundles. 



Stem-anatomy: Epidermis with a two-celled strength- 

 ening layer; few faint subepidermal strands of only 1 to 

 3 or 5 cells, and interlacunarly in the bark 1—2 circles of 

 bundles. The endodermis consists of usual 0-cells and the 

 arrangement of the vascular bundles of the central stele is 

 prototypic with four median bundles, see the fig. 80, A. 



Distribution. S.America. W. Patagonia, Rio Yelcha, 

 8. 1908. C. Skottsberg (hb. Uppsal.), n:r 386. 



P. ferrugineiis n. sp. 



CiO= c CiO Ci 





p. fbrosits Hagstr. A, 



Catdis ca. 0,5 m altus v. ultra, teres, crassus (3 mm ^^r 



in diam.), nodis annulatus, internodiis mediocribus v. brevi- Biacirs^'orihe tiorai leaves, i. b, 

 bus, simplex usque ad spicam primariam. i'^oKa ferruginea. Part of cross-section of stem, v, "/'•> 



^ -^ ■- * subepid. strands, f<kl, sclerenchynia- 



coriacea (omnia v. fere omnia), superiora (omnia?) longe tons tissnc, <r, central cylinder. " 

 petiolata petiolis laminas sequantibus v. superantibus, lance- 



olata, basi sensim attenuata, apice obtuse et conspicue cuspidata, laminis 70 — 90 X 

 20 — 30 mm, 19 — 21-nervia. LigulcB 35 — 45 mm 1., bicarinatse fuscse firmjB, in spatio 

 intercarinali 12— 15-nervia. PedwMCtfZws teres tequalis ca. 6 cm longus. Spica. deilorata 

 ca. 30 mm. I. Fructus siccus 3,6 X 2,5 — 3 mm eo P. nodosi simillimus (sed major) 

 carinatus, rostro subap'icali, operculo conspicue carinato, epicarpio loculoso. 



Anatomy of the stem: epidermis-cells somewhat stretched (3 to 6:1), pseudo- 



K. Sv. Vet. Akad. Ilandl. Band 5S. N:o 5 



21 



