1. PLATYZOMA. 2. GLEICIIENIA, § EUGLEICIIEXIA. 11 



Ord. FILICES. Ferns. 



Capsules (sporangia) 1-cellcd, usually membranaceous and dorsal, or marginal, 

 encircled by a complete or incomplete, jointed, elastic ring, collected in clusters 

 {sori) of a deiinite but varied form, with or without a covering (involucre, often 

 called indusium) ; or panicled or even spicate, rarely laxly scattered ; or the 

 capsules have the ring obsolete, or none, or the ring is confined to the apex of the 

 capsule, where it forms a longitudinally striated crown, bursting vertically ; or 

 the capsules are sunk in a many-celled, fleshy or corky receptacle of varied forms, 

 opening l)y pores or clefts on tlie upper surface. iSjyores minute, various in form. 

 — Vernation generally circinate, rarely erect. Gen. 1-75. Tab. I.-IX. Fig. 1-75. 



Sub-Ord. I. GLEICHENIACEiE, Br. 



Sori dorsal, of few (2-10) capsules. Capsules opening vertically, surrounded by 

 a broad, transverse, complete ring. Ini-ol. O. — Caud. mostly creeping. St. often 

 dichotoinons. Fronds rigid, generally large and dicliotomously branched, frequently 

 bcariug axillary buds. Vernation circinate. (Gen. 1, 2.) Tab. I. f. 1, 2. 



Gen. 1. Platyzoma, Br. 



Sori of few sessile caps. (" mixed with a pulverulent substance," Br.), arising 



from the apex of simple velnlcts, and concealed by tbe singularly revolute mar- 



. gins of the pinnae. — Caudex creeping, heautifally sericeo-paleaceous. ^iiinies, tufted. 



— Fronds 8 in. to 1 ft. \., j^innated, with small, coriaceous, cucullate pinnce, scarcely 



1 line 1. Tab. I. f. 1. 



1. P. microphyllum, Br. — III:. Sp. 1. p, 2. 



Hab. Trop. and subtrop. Australia, — A genus too nearly allied to Glcichenia. 



Gen. 2. Gleichenia, Sm. (see Appendix, p. 449). 



Sori of few (2-4 rarely 5-10) sessile caps., situated on a lower exterior veinlet. 

 — Caud. mostly creeping. Fr. rarely unhranched, generally dichotomously divided^ 

 of'enpiroliferousfrQm the axils of the forks ; pinnae deeply pinnatijid, with the seg- 

 ments small and concave, suborbicular, or pectinate with elongated lobes. Tab. I. f. 2. 



§ Eugleichenia. Sort solitary at the apex of a veinlet on the superior base of a 

 lobe ; lobes of the pinnce small, suhorbicidar. Sp. 1-0. 



1. G. (Eugl.) moniliformis, 'Moore ; caud, slender, substipitiform, erect, branched ; 

 St. tufted, 3-4 in. 1.; fr. coriaceous, 8-12 in. 1., 3 in. br., linear, deeply pinnatifid ; 

 lobes numerous, broad, concave beneath ; sori solitary, mixed with ferruginous 

 hairs. — Stromatopteris, JMett. in Ann. Sc. N. 1861, ^;>. 84. t. 3. 



Hab. New Caledonia, Vieillard, n. 1571. — A very remarkable species, but scarcely 

 differing from the present genus. 



2. G. (Eugl.) polypodioides, Sm. ; lobes of the pin7ice ovate, glaucous beneath ; 

 caps. 3-4, sunk in a cavity forming a flat-topped sorus. — Schk. F. t. 149 ; Hk. 

 Sp. \. p. 3. G. glauca, Sw. {non Hk. Sp. 1. p. 4). 



Hab. S. Afr. ; Cape Colony (north to Angola, Welwitsch). 



8. G. (Eugl.) circinata, Sw. ; lobes of the pinnce ovate or subrotund (most so 

 when fertile), more or less glaucous beneatb, the margins slightly recurved ; caps. 

 3-4, superficial, branches and rachis glabrous, or more or less clothed with chaffy 

 pubescence. — G. microphvlla, Br. Hk. Sp. 1./). 3. G. Speluncse, Br. Hk. Sp. 1. 

 p. 2. t. 1. B.; Guill. Ic. PL Austr. t. 12. G. semivestita. Lab. Sert. N. Cal. t. 11 ; 

 Hk. Sp. \. p. 3. t. 2. A (rachises and young fr. very paleaceo-pubescent). 



Hab. Australia, Tasmania, N, Zeal., N. Caledonia, Malacca. 



