Macmsamia.] CXXIV. CYCADACE^. 1507 



or more or less lobed reflexed apex. Seeds 2 to 25in. long and 1 to l^in. wide, 

 angular, covered by a brownish coloured integument. — Catalcidozamia Hopei, 

 Hill, Gard. Chron. (1865). 



Hab : Daihtree and Johnstone Rivers. 



Leaflets sometimes infested with the blight-fungus Sphceria macroznmiai, B. and Br- 



3. BOWENIA, Hook. 



(After Sir G. T. Bowen, first Governor of Queensland.) 



Male cones oblong-cylindrical ; females globular, the scales broad at the 

 apex, rather thick, truncate, the females with one pendulous ovule and seed 

 on each side. — Trunk of Macrozamia. Leaves bipinnate, with long petioles 

 and rhachis, the pinnules petiolulate, broad, oblique, without any midrib, the 

 margins entire or serrated. 



The genus is limited to the single Australian species, differing from Macrozamia only in 

 foliage and in the absence of the point to the cone-scales. 



1. B. spectabilis (showy), Ron!/. Hot. Maf/. t. 5398 ; Benth. Fl. Amtr. 

 vi. 254. "Jul-bin," Mt. Cook, Both; " Ja-yur," Cape Grafton, lloth. " Chi- 

 roo," Cairns, Nugent. Trunk thick, scarcely raised above the ground, marked 

 with the scars of the old leaves, the whole plant glabrous. Leaves attaining 

 in outline a length of 3 or 4ft. and spreading to at least half that breadth, 

 loosely bipinnate, the primary pinnte clustered 3 to 5 together a little below 

 the middle of the common petiole or rhachis, with one or 2 distant ones on each 

 side higher up, the rhachis nearly terete, each pinna often a foot long or more, 

 bearing 9 to 20 segments ovate or ovate-lanceolate, oblique or falcate acuminate', 

 tapering into a short petiole, marked with numerous parallel scarcely prominent 

 veins, 2 to 4in. long. Cones very shortly pedunculate, the males 1^ to 2in. 

 long, f to lin. diameter ; fruiting females nearly globular, 3 to 4in. diameter, 

 the scales with a narrow base between the seeds expanded into a broad thick 

 truncate apex whicli appears somewhat fleshy in the unopened cone, but when 

 ripe and dry is hard, not so thick, and fully lin. broad. — F. v. M. Fragm. v. 

 171 ; A. DC. Prod. xvi. ii. 534. 



Hab.: Endeavour River, /l. Cunningham; Rockingham Bay, W. Hill, Dallaclnj. 



Var. serrata. Segments serrate. 



Hab.; Mary vale, Rockhampton, A. TItozet. 



Order CXXY. HYDROCHARIDE^. 



Flowers mostly unisexual. Perianth of 8 or 6 segments, either all petal-like 

 or the three outer ones herbaceous and usually smaller, with a tube adherent to the 

 ovary in the females, without any tube in the males. Stamens 3 to 12 or rarely 

 more. Anthers 2-celled. Ovary inferior, either 1-celled with 3 parietal placentae 

 or more or less perfectly divided into 3, 6 or 9 cells ' Styles 3, 6 or 9, with 

 entire or 2-cleft stigmas. Ovules numerous, ascending or pendulous, ortho-- 

 tropous or anatropous, attached to placentas lining the walls or dissepiments 

 of the ovary. Fruit indehiscent, membranous or fleshy, ripening under water. 

 Seeds several or many, without albumen. Embryo straight, the plumule 

 more or less lateral, the radicle next the hilum.— Aquatic herbs, entirely 

 submerged or the lamina of the leaves floating. Leaves undivided. Flowers 

 enclosed when young in a spathe, either of 1 to 3 leaves or tubular and 2 or 

 3-lobed, the males 1, 2 or more in the spathe, the females soHtary. 



The Order has a wide range over the tropical and temperate regions both of the New and he 

 Old World. 



Series 1. Crlyc'ydrae. — Freslncater herbs. 



Tkibe I. Jl-yATillese.Stem branching, leafy. Spathes small, sessile. 

 Leaves whorled. Perianth double. Ovules anatropous i . 1. Hydbilla. 



