63. LYGODIUM, HYDROGLOSS-Uil. 439 



upper szgm. 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 ; surfaces naked or slightly villose \ spikes 1-2 lin. 1., 

 terminating the 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 

 bide below the pinnatifid apex. This is midway bet ween japonicum and polystachyum, 

 and has the pinnatifid barren segments of the latter. 



13. L. japonicum, Sw. ; primary petiole very short, secondary ^-1 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 orcrenulate ; 

 texture herbaceous ; surfaces naked or slightly villose ; spikes 1-2 lin. L, 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. Finlaysonianum, 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. 09. 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 \ in. 1. ; texture thin ; rachis 

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

 the edge of the leafy divisions. Kunze, t. 113. H. spectabile, Liebm. L. Lin- 

 deni, Hort. 



Hab. Mexico and Guatemala. 



15. L. (Hydro.) reticulatum, Schk. ; primary petiole - in. 1., secondary |-| 

 in. 1. ; pinnl. 6-9 in. L, 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., -f 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, Willd. H. scandens, Presl. L. Schkuhri and Forsteri, 

 J. Sm. 



Hab. Polynesian Isles and East Tropical Australia. 



16. L. (Hydro.) lanceolatum, Desv. ; primary petiole 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. L, f-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, Poir. 



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



SUB-ORD. V. MARATTIACE.E. 



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 circinate.* 

 GEN. 69-72. 



* An elaborate illustrated monograph of the sub-order (excluding Dancea} was pub- 

 lished byDe Vriese and Hartingat Leyden in 1853. They define altogether ninety-four 

 species. 



