TAB. XXXII.
if ■:
H Y M E N O P H Y L L U M . Sm.
Sori marginales. Sporangia sessilia vel subsessilia (annulo completo plerisque transverso)
receptáculo communi cylindraceo plerumque incluso inserta, in tra indusium
bivalve monophyllum, te x tu ra frondis areolis planis.— Filiculæ hahitu fe re omnius
ut in Trichomani, in regionibus tropicis proecipue. Sporulæ (m H . T unbridgense)
triangulares, linea triradiata depressa in disco.
Hymenophyllum Tunbridgense. Sm. (T a b . X X X I I . )—Engl, Bot. tab. 162. Hook.
F l. Fond, cum Ic.
A Genus, first separated from Trichomanes by Sir James Smith, chiefly on account of
the two-lipped involucre and the generally included receptacle. The sporules of the present
species, however, are considerably different from those of the Trichomanes alatum
(Tab. nostr. X X X I.) , and we may observe that the sporangia here given, in Mr Bauer’s
figure of H. Tunbridgense, exhibit a more decided stipes, and a more excentric point of
attachment, and consequently a more oblique annulus than we have ourselves observed in
this species. This appearance may have been owing to the very crowded state of the
sporangia in Mr Bauer’s specimens.
The species of this Genus are likewise numerous, and chiefly confined to the tropics.
Two, however, are found as far north as the British isles—namely, the subject of the present
plate and H . Wilsoni, Hook.
Fig. i . Upper side of a portion of a frond ; magn. 6 diam.—/ . 2. Under side of a sorus ; / 3. A
side view of the s ame; / 4. A longitudinal section; / 5. do. through the receptacle ; a n d / 6.
Transverse section of a sorus, through the receptacle ; m. 10 diam.—/ 7. Sporangia ; m. 50 diam.—
/ 8. Sporules ; m. 200 diam.—/ 9. Small portion of the frond ; m. 50 diam.