KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 25. N:0 5. 35 



Near Nilghiri Hills? 



This peculiar little plant seems closely related to D. nodosum Bailey (Cfr No. 38) 

 and to the D. undulatum of the same author (No. 39, q. v.), but it wants the nodes 

 of the one, and the undulate form and basal plications (or stigmata) of the other. 

 Three fronds, as depieted, only seen. 

 38. D. nodosum (Bail.) Ralfs. (Closterium nodosum, Bailey, Am. Desm. in Am. J. Sci. 

 p. 127, f. 3, 1846; Doc. nodosum Ralfs, Br. Desm. p. 218, t. 35, f. 8, 1848; Pleuro- 

 tcpnium nodosum, Lund. Desm. Suec. p. 90, 1871, et auct. nonnull.; Pl. (Docidiopsis) 

 nodosum, Racib. Desm. Nov. p. 35, t. III, f. 22, 1889). Besides the type there appear 

 to be two principal forms of this interesting species: 

 «. typica (Baileyana). Apices curta>, late diktats, crenatas; in semic. verticillis 4, 



unoquoque specimine nodis 8 instructo. Hab. U. S. America. 

 /?. Anglicum, n. v. Apices elongatae, prope fines 10 — 12 nodos parvos (vel tuberculos 

 cavos), et in finibns totidem nodulos minores conicos, habent. Noduli in quoque 

 verticillo 6 vel 8. 



Capel Curig, Wales, A. W. Wills — near Windermere, W. B. T. 

 y. dentatum, Archer. Apices inodice breves, dentatae, dentibus non projicientibns. 

 Nodnli in quoque verticillo 6? 



Galway, Ireland. Arch. in Dubl. Mic. Club, Q. J. M. Sci. 1872, p. 194. Cooke 

 in Br. Des. p. 13, 1887, gives this a new name, »var. Hibernicunn. 



Docidiopsis nodosum, Racib. 1. c. (sub. Pleurotamio) = y dentatum forma Polo- 

 nica, »lobo polari plus elongato, corona apicalis dentibus majoribus instructa,» {nodu- 

 lis apicalibus conicis plus quam dentibus?). Forma prselonga; noduli in quoque 

 verticillo 6. 



In Polonia. 



— — /. Indica. Apices breves, paullo dilatatae, 6-dentatEe, »dentibus» (ut in /. 

 Polonica) projicientibns. Noduli in quoque verticillo 6. Forma parva, brevis. Long. 

 208—240, lat, bas. 36-40, lat. apic. 20—21 fi. 

 Northern India. 



T. III, f. 7 a, Indian specimen; 7 b, apex of ft Anglicum, leg. A. W. Wills. 

 The Indian form is smaller than those of Europé, America, or Britain; the base of 

 some of the semicells is provided with peculiar processes, which appear to be instru- 

 mental in holding the segments together. For other forms of basal (and apical) pro- 

 cesses or appendages cfr t. III, f. 4 c, and T. VIII, tigs. 2, 3. 

 39. D. undulatum, Bailey (Micr. Obs. p. 36, t. I, f. 2, 1850) Pleurottenium nobile Richter 

 (Hedwigia, No. 9, 1865, c. ic); Doc. dilatatum Lund. (Des. Suec. t. V, f. 12, 1871) 

 also Wolle (Des. U. S. A. p. 50, t, L, f. 32, 1884) non Cleve! Specimina Indica 

 fila formant, 



Long. 260 — 290, lat. bas. 13 — 15, lat, centr. semic. 16 — 17, It. apic. 12 //. 

 T. IV, f. 16. 

 Northern India. 



In the Desm. U. S. A., p. 51, Mr. Wolle gives this with »apices rounded», and 

 on t. XI, f. 5 is a figure, which cannot be D. undulatum Bail. The oriental specimens 



