OVARY 



477 



Ottoa H. B. et K. Umbelliferae (in. 4). i Mexico. 



Ottonia Spreng. = Piper L. p.p. (Pip.). 



Ottoschulzia Urb. (Poraqueiba p.p.). Icacinaceae. 3 W.I. 



Oubanguia Baill. Tiliaceae. 5 trop. Afr. 



Oudemansia Miq. = Helicteres Pluk. (Stercul.). 



Ougeinia Benth. Leguminosae (in. 7). i India. 



Ouratea Aubl. (Gomphia Bff.). Ochnaceae. 150 trop. 



Ourisia Comm. ex Juss. Scrophulariaceae (in. i). 20 Am., N.Z. 



Ourouparia Aubl. ( Uncaria Schreb.). Rubiaceae (i. 6) . 30 trop., esp. As. 



Outea Aubl.=Macrolobium Schreb. (Legum. ). 



Outfit for collecting, cf. Collecting. 



Ouvirandra Thou. = Aponogeton Thunb. (Apon.). 



Oval (1. ), widish, tapering equally to base and tip. 



Ovary, the hollow chamber formed by the infolded sporophylls, in which 

 the ovules are borne on thickened placentae or cushions. It may be 

 superior (on apex of torus above sta.) or inferior (sunk in torus below 

 sta.) or intermediate, apocarpous (free cpls.) or syncarpous (united), 

 in spirals or whorled, radial or-|-in symmetry. It may be unilocular 

 ( i -chambered), or hi- tri- locular, &c. (often simply called multilcc.). 

 The imaginary joins of the cpls. are called the sutures (ventral if at 

 the centre), and the midrib of the cpl. is called the dorsal suture. 

 The placenta may bear one, two or more rows of ovules, or one or 

 two ovules only. The partitions of the ovary are called the septa, and 

 false septa, chambering it into more loc. than normal, are found in 

 Astragalus, Cmciferae, Gaylussacia, Linum, &c. 



DIAGRAMMATIC LONGITUDINAL SECTIONS OF FLOWERS, to show types of re- 

 ceptacle, ovary, stigma, &c. A, hypogynous flower with unilocular ovary, parietal 

 placentation, and numerous ascending anatropous ovules with raphe downwards; 

 stigma sessile, bilobed. B, perigynous flower with multi-locular ovary, a\-\\f nlar-en- 



tation, and numerous horizontal anatropous ovules with raphe upwar.ls ; style with 

 bifid stigma. C, epigynous flower with multi-locular ovary, apical placentation, and 

 solitary pendulous anatropous ovules with ventral raphe; style long with capitate 

 stigma, r, receptacle; k, calyx; c, corolla; a, stamens; a, ovary; st, stigma. 



The style, if present, may be long or short, cylindrical, filiform, 

 ribbed, &c. ; it may be terminal, lateral, or basal. The stigma or 

 stigmas may be sessile or on a style, simple (and then often capitate 

 or head-like), lobed, -fid, radiate, &c. 



The ovule may be sessile or stalked (on a.fttntcZe); erect, ascending, 



