SUB-SECTION ATHYRIUM, AND CETERACH. 69 
subsequently in Co. Donegal, by Mr. H. C. Hart. Very narrow 
with half-moon shaped pinnae. i5Xo'3 inches. 
11. gracile, Lowe (Frizellae gracile, Birkenhead). 
12. grammicon, Lowe. Raised from spores. Bushy habit. 18x1 
inches. 
13. Helena, Fox. Raised by Mr. E. F. Fox. 15x2 inches, 
lower half branch-crested ; upper pinnae all but wanting. Cuneate 
branched apex. 
14. lunuloides, Lowe. Raised by myself. 12 x 1 j inches. Upper 
half of frond pinna? lunulate but confluent, apex truncate. 
15. multifidum, Iwwe (Frizellae multifidum, Barnes , lunulato- 
multifidum, Wollaston). Raised in 1871, by Mr. Barnes. i8xo' 2 
inches. Pinnae smaller and more abortive than in Frizelliae. Frond 
terminating in a capitate head 9 inches across. The tips of the 
numerous branches crested, the crests being of a different character. 
I have raised one almost identical. 
16. ramosissimum, Lowe (Frizellae ramosissimum, Mapplebeck ; 
ramulo-lunulatum, Wollaston). Raised in 1873, by Mr. Mapple- 
beck. Length, 4 inches, width across the ramose head, 5 inches. 
A mass of branches (as many as 17) starting at the stipes. 
17. ramosum, Lowe (Frizellae ramosum, Lowe j and ramo-lunu- 
latum, Wollaston). Raised in 1874 by myself. 12X03 inches. 
Branching from the rachis, each branch representing the top 
portion of Frizelliae. 
18. sagittatum, Lowe (sagittato lunulatum, Jones). Raised by 
myself. Base sagittate, upper part gradually passing into Frizelliae. 
19. Shawii, Moore. A dwarf Frizellae, with lobes single instead 
of double, as in Frizelliae. 
*20. spicatum, Mapplebeck. 
# 2i. stellatum-angustatum, Druery. Interesting capitate head. 
22. superadornatum, Lowe. Raised by Mrs. Grant, of Hillers- 
don. The lunulate pinnae smaller, and the capitate head larger 
than in capitatum , and the plant more robust. 26xo - 2 inches 
(capitate head 6 inches). 
THE COMMON CETERACH. 
As plen iu M C ETER ac H. — Linnceus. 
(CETERACH OFFICINARUM. — Willdenow.) 
A SMALL pinnatifid fern, growing on rocks and walls in a limestone 
district, mostly on the sunny side ; having bluish-green, leathery, 
numerous fronds varying from 3 to 10 inches in length. The 
underneath of the frond is covered with reddish, chaffy scales, and 
the sori, which are more or less hidden by these scales, are linear- 
oblong. It is more abundant and more luxurious in Ireland than 
in England. During droughts the fronds fold up as if dead, but 
become fully expanded again after the first shower. Although it 
is abundant in the southern counties of England, and found in 
