THE FERN WORLD OF AUSTRALIA. 
33 
resupinate — turned on its back. 
revolute — rolled back. See margin of Cheilanthes fronds. 
rhachis — tbe common stalk upon which the leaflets are inserted. 
rhizome — rootstock, or stem of ferns. 
rugose — rough, wrinkled. 
Scabrous — rough from little asperities. See Dicksonia antarctic a. 
segment — a lobe of pinnatifid frond. See Polypodinm scandens. 
serrate — cut like the teeth of a saw. 
serrulate — teeth very fine. See pinna of Blechium serrulatum. 
sessile — without stalk, as some leaflets, the oak-leaved fronds of 
Polypodium rigidulum, spore-cases in Marattiese, &c. 
setose — bristly. See Polypodium Hookeri. 
simple — not divided, as fronds of Aspleninm nidus. 
sinus — ^recess formed by lobes of the frond. See sorus of Platy- 
cerium grande. 
soriferous — bearing the fructification. 
sorus — a seed-patch. 
spike — See fructifications of Ophioglossum. 
spore — seed of fern. 
spore-case — case containing spores. 
stipes — stalk of fronds. 
stoma^ Stomium — the opening provided on the side of the spore- 
case, for escapement of spores. 
striijB — small streaks. See spore-cases of Schizaea, Pinnules of 
Davallia, elegans, &c. 
Ternate — in threes. 
tomentose — having close dense downy hair, as Lindssea lanuginosa. 
trichotomous — divided in threes. 
truncate — blunt as if cut off. 
Umbrosa — growing in shady places, as Pteris umbrosa. 
undulate — having a wavy margin. 
Verrucosus — ^warty. 
virens — green. 
