Page:An introduction to physiological and systematical botany (1st edition).djvu/461

 Rh and uncertain genera as to number of pistils.

4. Tetragynia. Tetracera ought, by its name, to have constantly four pistils, but the rest of this order are very doubtful. Caryocar, whose large rugged woody nuts contain the most exquisite kernel ever brought to our tables, and which is the same plant with Gærtner's and Schreber's Rhizobolus, as the excellent Willdenow rightly judged, is not certain in number; and still less the Cimicifuga; whilst Wahlbomia is probably a Tetracera: see Willdenow.

5. Pentagynia contains chiefly Aquilegia the Columbine, and Nigella—both strictly allied to genera in the third order. Reaumuria indeed is here well placed. Some Nigellæ have ten styles.

6. Hexagynia consists of Stratiotes, ''Engl. Bot. t. 379; and Brasenia'', a new genus of Schreber's with which I am not acquainted.

I would recommend an union of the last five orders, for the same reason that