PURGING BUCKTHORN 549 



Puccoon (Am.), Lithospermum, Sanguinaria ; yellow-, Hydrastis. 



Pudding-pipe tree, Cassia. 



Puelia F ranch. Gramineae (13). 4 W. trop. Afr. 



Pueraria DC. Legmninosae (in. 10). 15 trop. As. to Japan. Fibre. 



Pugionium Gaertn. Cruciferae (4). 2 Mongolia. 



Pugiopappus A. Gray (Leptosyne BH., Coreopsis p.p. EP.}. Compositae 

 (5). 3 California. 



Pulchellus (Lat.), beautiful. 



Pulicaria Gaertn. Compositae (4). 30 Eur., As., Afr. P.dysenterica 

 Gaertn. (Inn la dysenterica L.) in Brit, (flea-bane). 



Pullea Schlechter. Cunoniaceae. 2 New Guinea. 



Pulmonaria (Tourn.) L. Boraginaceae (IV. 3). 10 Eur. P.officinalis 

 L. (lung-wort, formerly officinal) and P. angustifolia L. in Brit. 

 Both have dimorphic heterostyled fls. which change from red to blue 

 as they grow older (see fam.). 



Pulque, Agave. 



Pulsatilla (Tourn.) L. = Anemone Tourn. p.p. (Ranunc.). 



Pultenaea Sm. Leguminosae (in. 2). 80 Austr. 



Pulvinaria Fourn. Asclepiadaceae (n. i). i Brazil. 



Pulvinate, cushion-shaped. 



Pulvinus, a swollen joint, often concerned in movement, Galeopsis, 

 Marantaceae, Mimosa, Neptitnia. 



Pumelo, Citrus decuinana Murr. 



Pumilus (Lat.), low, small. 



Pumpkin, Cncnrbita Pepo L. 



Punctate, clotted. 



Punctum vegetationis (Lat.), growing point. 



Pungens (Lat.), sharp-pointed. 



Punica (Tourn.) L. Punicaceae (only genus). 2, one in Socotra, the 

 other, P. Granatum L., the pomegranate, from the Balkans to the 

 Himalayas, and cult. The young twigs have four wings, composed 

 simply of epidermis and cortical parenchyma ; these are early thrown 

 off. The fl. is 5 i reg., perig. K 5 8, valvate ; C 5 8, imbr. ; 

 A oo ; G adnate to receptacle. The mature ovary has a peculiar struc- 

 ture, due to a development like that in Mesembryanthemum. Two 

 whorls of cpls. with basal plac. are laid down, and then a peripheral 

 growth tilts them up from || || to == so that two layers of loculi 

 are formed and the placentation appears to be parietal. Ovules oo , 

 anatr. The arrangement is also seen in the fr. , commonly termed a 

 berry, but not strictly so. The pericarp (axial in part) is leathery, 

 and the fleshy inner part round the seeds is really the outer layers of 

 the seed coats. 

 Punicaceae (EP.\ Lythraceae p.p. BH.}. Dicots. (Archichl. Myrtiflorae). 



Only genus Punica (q.v.). 

 Puniceus (Lat.), bright carmine. 



Pupalia Juss. Amarantaceae (2). 7 Afr., Madag., As. 

 Pupunha palm, Bactris. 



Purdiaea Planch. (Costaea EP.}. Cyrillaceae. 3 Cuba, Colombia. 

 Purdieanthus Gilg. Gentianaceae (i). i Colombia. 

 Purging buckthorn, Rkamnuscatkartical^.; -cassia, Cassia Fistula L.; 

 - flax, Linum catharticum L. 



