528 POLYALTHIA 



Polyalthia Blume. Anonaceae (i). 70 palaeotrop. 



Polyandrococos Barb. Rodr. (Diplothemium p.p.)- Palm. (iv. 2). 3 



Braz. 



Polyaster Hook. f. Rutaceae (l). 2 Mexico. 

 Polyfootrya Humb. et Bonpl. Polypodiaceae. 30 warm Am., As., 



Polyn. 



Polycardia Juss. Celastraceae. 5 Madag. 



Polycarena Benth. Scrophulariaceae (il. 5). 12 S. and trop. Afr. 

 Polycarpaea Lam. Caryophyllaceae (i. 3). 30 cosmop. 

 Polycarpicae (Warming). The 8th order of Choripetalae. 

 Polycarpon Loefl. Caryophyllaceae (I. 3). 7 cosmop. P. tetraphyllum 



L. (polycarp or allseed) in Brit. 

 Polycephalium Engl. Icacinaceae. 2 trop. Afr. 

 Polyceratocarpus Engl. et Diels. Anonaceae (4). i Usambara. 

 Polychaetia Less. =Nestlera Spreng. (Comp.). 

 Polychilos Breda, Kuhl, et Hasselt (Phalaenopsis p.p. BH.) Orchi- 



daceae (il. 20). i Burma. 



Polyclathra Bertol. Cucurbitaceae (inc. sed.). i Guatemala. 

 Polycline Oliv. Compositae (4). 2 E. trop. Afr. 

 Polycnemum L. Chenopodiaceae (A). 5 Eur., Medit. Structure of 



the fr. curious, a ridge developing at its apex after fert. 

 Polyctenium Greene (Smelffwskia p.p.). Cruciferae (4). 3 N.W. 



U.S. 

 Polycycnis Reichb. f. Orchidaceae (n. 13). 3 Guiana to C. 



Am. 



Polydragma Hook. f. Euphoibiaceae (A. n. 2). i Perak. 

 Polygala (Tourn.) L. Polygalaceae. 475 cosmop.exe. N.Z., Polynes., 

 and Arctic zone. A few have stipular thorns. P. vulgaris L. (milk- 

 wort), in Brit. The fls. owe their conspicuousness to the two coloured 

 sepals; they occur in three colours, red, white, and blue, usu. on 

 different plants but sometimes on the same. The essential organs in 

 most sp. are contained in the keel and emerge from it, as in 

 Leguminosae, when it is depressed by a visiting insect. P. Senega L. 

 (Senega snake-root) in N. Am. is medicinal. 



Polygalaceae (EP.,BH.). Dicots. (Archichl.Geraniales; Polygalinae 

 BH.}. 10 gen., 700 sp. , cosmop. exc. N.Z., Polynes. , and Arctic 

 zone. Herbs, shrubs, or small trees with simple entire alt. opp. or 

 whorled usu. exstip. 1. ; the stipules when present are usu. thorny or 

 scaly. Infl. a raceme, spike, or panicle, with bracts and bracteoles. 

 Fir. diplochlam., medially ] . K usu. 5, rarely (5), the 2 inner sepals 

 (alae) often large and petaloid ; C 5, rarely all present usu. only 3 

 the lowest and two upper joined to sta.-tube, the median ant. petal 

 keel-like and often with a term, brush; A in two 5-merous whorls, 

 u-u. only 8, or 7, 5, 4 or 3, usu. united below into an open tube; G 

 (5 2), usu. (2), antero-post., 2-loc. with i anatr. pend. ov. in each 

 loc. (rarely i-loc. with oo ov.). Caps, nut or drupe. Endosp. or not. 

 The fl. mech., like the structure, resembles that found in many 

 Leguminosae (cf. Krameria). Chief genera : Polygala, Securidaca, 

 Xanthophyllum. For floral diagram see p. 529. 

 Polygaleae (BH.) = Polygalaceae. 

 Polygalinae (BH.). The 3rd order of Polypetalae. 



