650 FLOWERS OF GARDEN AND GREENHOUSE 
A. DIMORPHUM (two-formed). Stipes tufted, 6 to 12 inches long. 
Fronds 2 to 3 feet long, over a foot across, triangular-oval ; lower pinne 
of similar shape to frond, 6 to 8 inches long, bluntly ict bvadd Sori- 
bearing pinne very narrow, sometimes forked; sori marginal. Native 
of Norfolk Island. Warm greenhouse. 
A. FALCATUM (hooked). Rootstock creeping, chaffy. Stipes tufted, 
6 to 9 inches long. Fronds 6 to 18 inches long, 4 to 6 inches across, 
lance-shaped. The pinne stalked, oval, unequal-sided, ending in a 
curved point. Sori in long irregular lines, reaching nearly to the edge. 
Introduced from Polynesia, 1825. Greenhouse. 
A. Fintx-ra@mina (Lady Fern). Rootstock stout, several inches 
above surface. Stipes 6 to 12 inches long, stout, brittle, brown or pale 
yellow, scaly below. Fronds large, oblong, lance-shaped, twice or thrice 
pinnate, thin textured, soft and waving. Pinnz lance-shaped, close-set ; 
pinnules coarsely toothed, or cut pinnately. Sori small and numerous, 
with a short oblong or kidney-shaped involucre. Native, and of world- 
wide distribution. Hardy. In addition to several important natural 
varieties, over three hundred garden varieties have been named, some of 
them extraordinary departures from the t 
A. FLABELLIFOLIUM (fan-leaved). Stipes tufted, 3 to 6 inches long. 
Fronds procumbent, straggling, 6 to 12 inches long, and not exceeding 
an inch across, rooting at the tip. Pinnz fan-shaped, lobed, } to } inch 
across. Sori oblique, numerous, but irregularly scattered. Introduced 
from Temperate Australia, 1820. Greenhouse. 
A. HemIoniTIs (Hemionitis-like). Stipes tufted, 4 to 8 inches long. 
Fronds spear-shaped, 4 to 6 inches either way. Sori narrow, upon the 
veins. Native of South Europe and North Africa; introduced 1779. 
Cool greenhouse. 
A. MARINUM (sea). Sea Fern; Sea Spleenwort. Rootstock stout, 
clothed with purple-brown scales. Stipes 3 to 6 inches, red-brown, 
stout, polished. Frond 3 to 10 inches long, oblong or lance-shaped, 
leathery, glossy, pinnate; rachis winged. Sori large and oblique ; 
involucre leathery. Native; but if away from the sea will only grow 
under glass, in humid atmosphere. 
A. Nipus (nest).  Bird’s-nest Fern. Stipes very short. Frond 
lance-shaped, undivided, 2 to 4 feet long, 3 to 8 inches broad, tapering 
downwards; margin entire, midrib rounded at back. Sori starting 
near midrib and extending half-way to margin. Introduced from India, 
1820. Greenhouse. Plate 306 
A. TRICHOMANES (soft-haired). Maidenhair Spleenwort; English 
Maidenhair. Rootstock stout. Stipes crowded, 1 to 4 inches long, 
