Winged seeds are produced freely from the trilocular capsules which are 2-5 cm long: the seeds germinate readily.    From Wordnik.com.  [Chapter 37] Reference

The female flowers are followed by dehiscent capsules, usually trilocular, with 6 seeds, usually winged for wind dispersal, though many of the cultivated forms have become partially or highly sterile.    From Wordnik.com.  [Chapter 37] Reference

The heart is not quadrilocular (i.e., of four chambers), but trilocular (of three), and two structures, not seen in Lepus, the truncus arteriosus and the sinus venosus, into the latter of which the venous blood runs before entering the right auricle, are to be noted.    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

Short in proportion to the Corolla tho wide or bulky; the Style is very long or longer than the stamens, simple, cilindrical, bowed or bent upwards, placed on the top of the germ, membranous shrivels and falls off when the pericarp has obtained it's full Size. the Stigma is three clefts very manute and pubescent. the pericarp is a capsule, triangular, oblong, obtuse, and trilocular with three longitudinal valves. the Seed So far as I could judge are noumerous not very manute and globilar.    From Wordnik.com.  [The Journals of Lewis and Clark, 1804-1806] Reference