91 
ANGTJLAE PEICKLT PEEN. FolysticTium angulare. 
See 'page 49. 
The varieties of the Angular Prickly Fern may be 
divided into two groups consisting of plants with Eegular 
and Irregular Fronds. 
1. The Eegular are those, which have both the pinnaa and 
the leaflets proportionately increasing or decreasing. 
2. The Irregular are those, which have either the pinnae 
or the leaflets, or both, not proportionately increasing or 
decreasing ; thus, a pinna may be short between two longer 
ones, or branched, or crested at its ends, or a leaflet or 
leaflets may be very small or stunted between two longer 
ones of the ordinary size. (See woodcut of linear variety). 
There are Thirty-nine Eegular and Fifty-one Irregular in 
their fronds. 
Eegtjlab Angtjlab Febns. 
1. Spear-shaped A. F.* Sastulatum, This is an elegant 
plant having fronds of a narrow lance-shaped form. The 
leaflets with their distinct ear or auricle are stalked and 
terminate in a bristle. They are sharp-pointed, small, and 
if the ear were removed, would be lance-shaped. This auricle 
is very distinct and in the case of the lower leaflets is 
separated by a deep incision. The pinnse and leaflets from 
not being crowded have a light appearance. The fronds 
sometimes attain to the height of two feet and at their 
broadest part to the width of six inches. This varies not 
much from the ordinary form and may occasionally be met 
with in all parts of the district. 
2. Acute A. F. Acutum, This is a tall and handsome 
plant. It difiers from the preceding in having the leaflets 
more elongated. They are also rather narrow except at the 
base, where there is a sharp-pointed auricle. The tip of 
the leaflets is occasionally hooked and the points are 
bristled. If the leaves are serrate, the tip of each serrature 
is bristled. As the leaflets are stalked and the pinnae 
distant from each other, even the largest fronds of this 
variety have a light and elegant appearance. Sometimes 
A. F. is used for Angular Fern. 
