Polypodiacea.
TAB. XVII.
W O O D W A R D IA . Sin.
Sori venis transversis macularum costalium inserti, lineares, immersi, costæ contigui.
Indusium lineare, fornicatum, coriaceum, sorum involvens.— Rhizoma
subglobosum. Frondes fasciculatoe, coriaceoe aut herbaceoe, dissimiles. Venæ in-
ternoe, tenues, ramosissimoe, in maculas inoequales anastomosantes, maculis costalibus,
elongatis, costæ parallelis, mediis hexagonoideis ad ángulos superiores externos vénulas
liberas furcatas simpUcesque gerentibus. Presl.
Woodwardia Sw. Syn. Fil. p . 117.
A sm a ll b u t v e ry h a n d som e g e n u s , w h ich , as c irc um s c rib e d b y P r e s l, n e v e rth e le s s co n s
titu te s tw o g ro u p s w ith th a t a u th o r . § I , Frons coriácea, fertilis non dissimilis. Sori breves ;
— in c lu d in g , b e s id e s o u r W. radicans, Sw ., W. staus, S w . ; to w h ich m ay b e a d d e d , W.
prolifera. H o o k , e t A rn . in Bot. o f Beech. Voy. p . 2 7 5 . t. 5 7 . §. I I . Frons herbácea, fertilis
dissimilis. Sori longiores s— in c lu d in g tw o N . A m e ric a n sp ecie s, W, angustifolia, Sm.
(W . onocleoides, W il ld .) , a n d W. ihelypteroides, P h .
W. Virginica, Sw ., is, b y P r e s l , r e f e r r e d to Doodia o f B row n , w h ich , h e o b s e rv e s , o n ly
d iffe rs from Woodwardia in tlie v e in s a n d v e in le ts b e in g p rom in e n t on th e u n d e r s id e ,
th e so ri r a t h e r r em o te from th e co sta , n o t im m e rs e d n o r lin e a r, a n d in th e flat, n o t
fo rn ic a te , in d u sium .
Fig . 1. Portion of the under side of a fertile frond ; magn. 2 diam.—/ . 2. Smaller portion of the
upper surface; m. 2 diam.—/ . 3. A very small portion of the under surface, with young so ri;—m.
10 diam.—/ 4. Upper surface of the same j 10 diam.—/ . 5. A similar portion of the under surface
with ripe so ri; w. 10 diam.—/ 6. A transverse section of the same made through the so ri; m. 20 diam.
—f . 7. Young sporangia.—/ . 8. 8. 8. Old sporangia and sporules ; m. 100 diam.