On 20 Dec 2003 19:13:44 GMT, (MLEBLANCA) opined:

I agree with Pam's ID on all of these
and would like to add
24 and 28 are Cyperus alternifolius,
common name is Umbrella Plant
It is a sedge, not Papyrus, but related to it.
Liked by flower arrangers, it can be pesty and
spread in damp, wet ground. Wil grow in ponds.

Emilie
NorCal

Thanks, Emilie. Correction noted.