Page:An introduction to physiological and systematical botany (1st edition).djvu/331

 Rh seeds furnished with a capsule, as Epilobium t. 1177, Asclepias, Cynanchum, &c., Gærtn. t. 117, as well as for a similar appendage to the base or sides of any seeds, as Salix, ''Engl. Bot. t. 183, 1403, Eriophorum, t.'' 873, &c., neither of which can originate from a Calyx. For the former of these Gærtner adopts the term Coma, for the latter Pubes, which last also serves for any downiness or wool about the Testa of a seed, as in the Cotton plant, and Blandfordia nobilis, ''Exot. Bot. t.'' 4.

Cauda, a Tail, is an elongated, generally feathery, appendage to some Seeds, formed from the permanent style, as in Clematis, ''Engl. Bot. t. 612, Dryas, t. 451, Geum, t.'' 1400.

Rostrum, a Beak, mostly applies to some elongation of a Seed-vessel, originating likewise from the permanent style, as in Geranium, t. 272, Helleborus, t. 200, though it is also used for naked seeds, as Scandix, t. 1397.

Ala, a Wing, is a dilated membranous