G8. LYGODIUM, HYDROGLOSSUM. 439 



upper segm. sessile, ovate-deltoid, pirmatifid, 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 

 side below the pinnatifid apex. This is midway between japonicum and polystachyum, 

 and has the phmatifid barren segments of the latter. 



13. L. japonicum, Sw. ; primary petiole very short, secondary |-1 in. 1. ; pinnl. 

 4-8 in. J., 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 ; spikes 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 Loo 

 Choo Isles. L. F inlay sonianum, 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 l\ in. 1. ; pinnl. with 2-3 bipartite segm., the ult. divisions 4-6 in. 1., 

 | in. br., the petioles not articulated, the lowest often \ in. 1. ; texture thin ; rachis 

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

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

 deni, Hort. 



Hab. Mexico and Guatemala. 



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

 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 ]-3 lin. 1., in close rows along the edge of the segments. Schk. 

 t. 1 39. 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. 1., 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, &c. 



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



