460 THE FAMILIES, GENERA AND SPECIES OF PTERIDOPHYTA. 



T. Hymexophyllum, Smith. Filmy Fern. 



Sporangia with a transverse ring, sessile and crowded on a 

 columnar receptacle arising from the centre of an indusium, 

 cup-shaped at the base, deeply 2-lobed in the upper portion. 

 Receptacle very rarely slightly exserted from the indusium. 

 Mostly small, densely matted, epiphytical ferns, with slender 

 creeping rhizomes. Leaves membranous, variously divided; 

 the ultimate lobes usually i-veined. Sori terminal on the veins, 

 marginal on the fronds, the base mostly embedded in the tex- 

 ture, the valves exserted. 



Leaves glabrous, not toothed, lanceolate, 1-4 ins. 

 long, pendant from the top of stipe; rachis winged. 



I. rarnm. 

 Leaves ciliated and hairy, linear-lanceolate. 3 to 9 ins. 



long; rachis not winged 2. lincore. 



1. H. rarnm, R.Br. — Houtboschberg, Ze. 6,800 ft. 



SchlccJiter 4.758, in part. 



2. H. linearc, Sw. — Transvaal Goldfields, Macamac, Ly.; 



specimens sent by Mr. Ayres (teste Lady Barkly and 

 Buchanan) ; apparently not since found in South 

 Africa. 



2. Trichomaxes, Linn. 



Sporangia with a transverse ring and opening irregularly 

 from the top, sessile and crowded on the base of a columnar 

 receptacle arising from the centre of a tubular indusium mostly 

 dilated at the summit and truncate. Receptacle almost hair- 

 like, usually exserted from the indusium. Mostly small epiphy- 

 tical ferns, with membranous leaves. Sori terminal on the 

 veins, marginal on the fronds, embedded in the texture or 

 protruding. 



Leaf I — 2-pinnate. 



Leaf 1-4 ins. long; rhizome slender, creeping, set 



with black shag i. pyxidifcrniii. 



Leaf 3-8 ins. long, more or less tufted; rhizomes 

 stout, short, set with lanceolate dark scales. 



2. rigid 11 !}i. 

 Leaf pinnately lobed Imt not pinnatitid, almost sessile. 



3. piisilluiii var. qucrcitoliiiiii. 



1. T. pyxidifcritni, Linn. — On tree-trunks in kloofs, 2,300- 

 4,200 ft. Macamac and I'ilgrim's Rest, Ly., Mac Lea in herb. 

 Bolus 3,019, Sabie Hoek Forest, Ly., Burtt-Davy. 1.525; 

 ]\Iamotsuiri, near Shiluvane, Ze., Jnnod 212, 1,702. 



2. T. rigidum, Sw. — Mountain kloofs; Drakensberg, near 

 Macamac, Ly., McLea; Mamotsuiri, near Shiluvane. Ze., 

 2,300 ft. " common," Junod 210. 



3. T. piisillnm, Szv., var. qucrcifoliuiii. Hook, and Grev. — 

 Sabie Hoek Forest, Lv., 4,200 ft Bnrit-Dav\\ 1,525a (T.M.H. 

 366). 



Family IW—CYATHEACE.H. Tree-ferns. 



Vernation circinate. Sori globose, marginal or on the under 

 side of the leaves, inserted on an elevated receptacle, naked 



