68. LYGODIUM, §§ HYDROaLOSSUM. 439 



upper sigm. sessile, ovate-deltoid, pinnatifid, lower short-stalked, deeply pin- 

 natifid or pinnate in the lower part, the divisions pinnatifid, the base not arti- 

 culated ; texture herbaceous ; swrfaces naked or slightly villose ; spihes 1-2 lin. 1., 

 terminating tlie ultimate lobes. 



Hab. Madagascar and the Comoro Isles ; collected by Bojer, Kirk, and Speke. — The 

 segments are very close, often imbricated, and in well-developed pinnules six on each 

 side below the pinnatifid apex. This is midway between yapo»ic«m and ^o^atocAyMm, 

 and has the pinnatifid baiTen segments of the latter. 



13. Xt. japonieum, Sw. ; primary /)e<Jofe very short, secondary^-! in. 1. ; pinnl. 

 4-8 in. 1., nearly as broad, deltoid ; the terminal segm. pinnatifid or hastate, the 

 lateral ones 2-3 on each side, very unequal, not articulated at the base, the lower 

 ones long-stalked and pinnate in the lower part, the divisions entire or crenulate ; 

 texture herbaceous ; surfaces naked or slightly villose ; spihes 1-2 lin. 1., the lamina 

 of the fertile divisions often much reduced. — Beddome, t, 64. 



Hab. Japan and the Himalayas to Ceylon, Java, Philippines, Hong-Kong, and North 

 Australia.^ — L. Mnlaysonianum, Wall., and L. tenue, Blume, both appear to be forms of 

 this with the lamina of the fertile divisions nearly obsolete. 



§§ Hydroglossum, Presl. Veins anastomosing. Sp. 14-16. Fig. 69. c. Lygo- 

 dictyon, J. Smith. 



14. L. (Hydro.) heterodoxum, Kze. ; primary petiole obsolete or very short, 

 secondary 1^ in. 1. ; pinnl. with 2-3 bipartite segm., the ult. divisions 4-6 in. 1., 

 f in. br., the petioles not articulated, the lowest often J in. 1. ; texturethin ; racEis 

 and surfaces naked ; veins joining copiously ; spikes 1 lin. 1. ; in close rows along 

 the edge of the leafy divisions. — JCwige, 1. 113. H. speotabile, Liebm. L. Lin- 

 deni, Hort. 



Hab. Mexico and Guatemala, 



15. L. (Hydro.) reticulatum, Schk. ; primary petiole J-J in. ]., secondary ^^ 

 in. 1. ; pinnl. 6-9 in. 1., 4-6 in. br., with a terminal segm. and 4-6 nearly uniform 

 ones on each side, which are cordate-hastate or ligulate-oblong, rounded or cordate 

 at the base, 2-3 in. 1., -^-J in. br., all articulated at the base, the lower ones short- 

 stalked ; texture subcoriaceous ; rachises naked or slightly villose, sometimes 

 ebeneous ; spikes 1-3 lin. 1., in. close rows along the edge of the segments. — Schk, 

 *. 139. H. polycarpum, JFiWi. H. scandens, Pre«i. X. Schkuhri and Forsteri, 

 J.Sm. 



Hab. Polynesian Isles and East Tropical Australia. 



16. L. (Sy&co.) lanceolatum, Desv. ; primary ^eJaofe short or obsolete, secondary 

 1 in. 1. ; pinnl. 8-12 in. 1., 6-10 in. br. ; segm. 3-4 on each side, uniform, 4-6 

 in. 1., j-1 in. br., all stalked, articulated at the base, the base rounded or cuneate, 

 never cordate ; texture coriaceous ; rachis and surfaces glossy ; spikes 1-2 lin. 1., 

 in close rows along the edge of the segments. — H. madagascariensis, I'oir. 



Hab. Madagascar, Bojer, Forbes, Meller, &o. 



Sub-Obd. V. MARATTIACE^. 



Caps, opening by a slit down one side or a pore at the apex, without a ring, 

 usually joined together in concrete masses (synangia). Vernation ciroinate.* 

 Gen. 69-72. 



* An elaborate illustrated monograph of the sub-order (excluding Vanma) was pub- 

 lished by De Vriese and Harting at Leyden in 1853. They define altogether ninety-four 

 qpecie!?. 



