M
TAB. CXVI.
O X Y G O N IU M . Pre sl.
D i p l a z i i sp. P r e s l. C a l l i p t e r i s . J . Sm . iu Hooh. Jo u rn . o f B o t.
S o r i lineares, elongati, bilaterales, seu duplices, au t venulæ superiori e furcatura
primaria aut inferiori e furcatura secundaria, au t omnibus venis venulisque inserti.
In d u s ium lineare, planum, bilaterale, seu duplex.— Rhizoma repens. Frondes
sparsæ, coriaceoe, longe stipitatæ, simplices, ovatæ (v e l p in n a tæ , J . Sm .), acum
in a te , a u t o vato-lanceolatæ, acutoe, integerrimæ. Yenæ p in n a tæ , crebræ, su p ra
p rom in u læ , u n i-b ifu rca toe ra riu s simplices venulisque pa ra lle læ , versus m a r ginem
fr o n d is a reu acutangulo uno-duobus apice ven u lifero anastomosantes,
v enulis eæ apice angulorum emergentibus liberis acutis. P r .
Oxygonium ovatum. P r .— Asplenium. W a ll.
A Genus established by Presl, and which lie says differs from Anisogonium (its near
ally) in the veins and veinlets being parallel and forked; near the margin of the frond
uniting in a double or single acute arch, again bearing a veinlet at their apex; and in the
sori being (not always) bilateral or double. I find tbe veins of tbe sterile to anastomose
much more tlian tbe fertile fronds in the species here figured.
T ab. CX VI.—Fig. 1. Sterile fro n d ; n a t. size : f . 2. Portion of th e same to show the venation :
f . 3. Portion of a fertile frond; / . 4. Lesser portion of the same: f . S. Portions o f so ri: / . 6. 7.
Sporangia: / . 8. Sp o ru le s;—magnified.