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



159 



Distribution. Japan, Kinsin, Kundalo-San, 1863, Maximowicz (hb. Stockh.). 

 I have also seen specimens from ^Hakodate Arigona», gathered ^^J2i June 1861 by 

 Maximow^icz, it. sec. (hb. Petersburg), and from Ins. Saghalien, 08, Faurie (hb. Haun.). 



,cc 



-end 





p. pleiopliylliis n. sp. — Fig. 77. 



P. natans L. f. indica MiQ., Fl. Ind. Bat. Suppl. T, 1860—62, 259, 597? Cf. 

 MiQ., Flore de I'Arch. Indien, 1870—71. 



Caulis 30 — 70 cm. altus teres tenuis simplex vel inferne ramulis brevibus, in- 

 ternodiis ca. (10 — ) 60 — 120 mm longis. Folia infima linearia filiformia, 100 x 1 mm, 

 ± acuta, 3-nervia; superiora ± coriacea numerosa petiolata, petiolis tenuibus 50 — 110 

 mm longis, lanceolata vel basi ± rotundata, apice 

 brevissime et ± obtuse cuspidata (»les feuilles na- ^ l\\ B 

 geantes sont plus ou moins elliptiques au sommet 

 aigues, a la base aigues ou presque aigues»: MiQ.), 

 35 — 70 X 10 — 18 mm, 11 — 13-nervia. Ligulce tennes, 



20 — 40 mm, inconspicue bicarinatse, fuscescentes |j I I '^^'"^""""I^O yb 



deciduae, 5 — 6-nervi3e. Spec, sine fructu. 



Tall specimens of this species are easily re- 

 cognizable by the numerous (10 — 12) and slenderly 

 long-petioled small leaves with more or less cori- 

 aceous blades even beneath the primary spike. 

 The lovi^est leaf, at least in deep-water specimens. Fig. 77. p. piewphymis hagsth. a. Top of 



--,,■., PIT ir ^1**^ lowest submersed leaf, ?. B, Blade of a 



lacks hmb, whereupon follows one or a couple of floating leaf showing the nsnal shape of it, j. 



transitional leaves with very slight limb (10-20 l.^'^:^l '^!:'::'t2:f :^T:' :Si. 

 mm). In shallow-water specimens those transition endodeimis, .*, coitioai hnndies, ep, epidermis. 



leaves seem to be the very nethermost. 



Stem-anatomy: Central cylinder with 2 median and 6 lateral free bundles, 

 0-endodermis, one circle of interlacunar bast- and vascular bundles in the cortex 

 and no or extremely few subepidermal strands, epidermis without, or endowed with 

 a one- celled strengthening layer. 



MiQTJBL has looked upon this plant as a variety of P. natans. I am inclined 

 to think that his f . indica consists of both P. pleioph. and P. digynns. 



Distribution. Asia, India: Khasia, Hooker & Thomson (lib. Lund). — Speci- 

 mens from sAlatan pandjang, W. K. Sumatra^ (leg. Teysmann) seem to me to 

 belong to this species, or possibly rather to P. digynus {pervers^ls). — China, Yunnan, 

 and Formosa, 1. Henry (hb. Haun.). 



atr 



P. stagllOl'llin Hagstr. ap. R. E. Fries, Bot. Unters. in Wiss. Ergebn. schwed. 

 Rhod.— Kongo-exp. 1911—12, I, 1915, 187, fig. 16. — Fig. 78. 



Caulis ca. 30 cm altus simplex teres vel subteres. internodiis inferioribus 50 — 75 



