TERMINOLOGY. 123 
n. Uniform, (uniformis), when all the pappi in 
a common perianth are of the same form. 
-o. Unlike, (difformis s. dissimilis), when in a 
common perianth the pappi are of different 
forms. 
p. Doubled, (geminatus), when a pappus is 
composed of two kinds; for instance, when 
the pappus on the outside is calyciform, on 
the inside capillary or hairy ; or on the out- 
side calyciform, on the inside setaceous; or 
also on the outside calyciform, and on the 
inside plumose. 
N. We must beware of confounding the hairs 
which sometimes cover seeds with the true pappus. 
In Eriophorum there is no true pappus, but merely 
hairs that surround the seeds: this is called Lana 
pappiformis. : | 
3. The Turr, (coma), is a body that appears like 
a pilose pappus, and is not to be distinguished from 
it except by its origin. The coma is always attached 
to the seeds that are contained. in a pericarp, and 
never occupies the place of a calyx, as in Asclepias 
syriaca, Epilobium, &c. fig. 168, 169. 
- 4, The TAIL, (cauda), is along, thread-like body, 
that appears on the top of the seed, or of the utri- 
culus, and is set with fine hairs, as in the pasque- 
flower, Anemone He eg Clematis, and many 
others, fig. 164. 
N. The seeds of the Typha latifolia seem to have 
a pappus; but it is at the top a smooth straight 
cauda, and the seed is supported on a long stalk, 
that 
