224 
IX. The Coma, or Tuft, is very nearly allied to Pappus , and by the 
generality of botanists confounded with it. Gsertner first made the distinc¬ 
tion, and judiciously discriminates it from the pappus, as being the feathery 
crown of seeds contained within a capsule , as the Willow-herb (Epilo- 
bium). 
III. The Pubes, or Down , is a soft appendage or woolliness attached to 
the base or side of seeds, as the Willow (Salix), Cotton-grass (Erioppio- 
rum), Cotton-plant (Gossipium). 
IV. The Cauda, or Tail , is an elongated, generally feathery appendage 
to some seeds, formed from the permanent style; or in other words, a slender 
process, or thread, terminating a seed, hirsute , from the base to the apex. 
The Cauda is much longer than the seed itself, as in Virgins Bower (Cle¬ 
matis), and in the Pasqtce Flower (Anemone Pulsatilla). 
V. The Rostrum, or Beak, is an elongation also of the style, which is 
permanent, but affixed to the pericarp , as in the Geranium . 
VI. The Ala, or Wing, is a dilated membraneous appendage affixed to 
some seeds. In such seeds the wing is commonly solitary, except in some 
umbelliferous plants, as in the Thapsia . 
When it occupies the top and back, it is especially denominated a 
Wing (Ala); but when it surrounds the sides, a Margin (Margo). 
Pericarps as well as seeds are also furnished with Alas, Wings, hence 
the botanical terms 
One-winged (Monopterygia), possessing one wing only, as the Ash 
(Fraxtnus). Two-winged (Dipterygia), as the Maple (Acer). Three¬ 
winged (Tripterygia), as the Begonia. Four-winged (Tetraptera), as 
the Halesia Tetraptera, Four-winged Fialesia. Five-winged (Pentap- 
tera) Guaicum. Many-winged (Polyptera), Crown Imperial (Fritil- 
laria). A membraneous Margin (Margo Membranaceus), as in Shep¬ 
herd's Purse (Thlaspi Bursa Pastoris), and Penny-wort, (Hydroco- 
tyle.) 
VII. The Crista, or Crest, is very nearly allied to the wing, but it is 
narrower, less flexible, and formed of a coriaceous or cork-like matter, and 
always placed at the back of fruits. 
VIII. The Hama, or Hook, is a hooked projection arising from seeds or 
pericarps, which attaches itself to passing bodies, as in the Burdock (Arc¬ 
tium Lappa). 
