the antlicrs connected at the apex and villous; style 

 slu)i-t, with broad stigma: fr. consisting of 2 follicles, 

 coutaiuiug numerous, small, winged seeds. 



GrsBca, Linn. Silk Vine. Deciduous shrub, twining 

 to 40 ft. : Ivs. petioled, ovate to oblong-lanceolate, 

 acununate. dark vrn-m and glossy above, 2-4 in. long: 

 (Is. in l0'>-.r. li.iiL |M .|iiii. I. .1 cymes, brownish purple 

 inside, gn-. m . : lu-in and outside, %-l in. 



across; piinl - .iis; crown with 5 slender 



thread-Iikr in mil -liioMus appendages: follicles 

 narrow, about -1 in. long, .liily, Aug. S. Eu., W. Asia. 

 B.AI. 22«l. B.K. 10:803. L.B.C. li:1389. Gn. 34, p. 78. 

 — Under the name of P. aiujtistifolia a narrow-leared 

 form is aoraetimes cultivated, but it is P. Grmca, var. 

 (nirjiistifolia, Jilg. The true P. angustifoUa , Labill., is 

 synonymous to P. Imvigala, Ait., from the Canary Isl. 

 and N. Africa, with persistent Ivs. and pubescent ap- 

 pendages of the crown. Alfred Rehdfr. 



PEKISTfiEIA (Greek, dove, from the f.irin ..f the 

 column and wings). OrchidticeiB, A ^cnu^ ot -i;ii'ly 

 South Amcricau orchids, having large i.li. mi.- 1. avts 

 unfoldiiiix successively, and tall, erect or huugiug 

 ll.>\vi-r-s|iikes. The flowers are nearly globose or cup- 

 shaped, of a waxy texture, with broad, concave seg- 

 nunts. The genus is distinguished from the related 

 gi-nira Acineta, Sacaena, Gongora, etc., by the curious 

 sha|t" of till' laliillum and column. The base of the 

 liilMlluiii I liy|iM,liil I is united with the column by broad 

 wiuL^s ( |ilfuri.li;( 1, The upper part of the labellum 

 icpicliili is uiovni.lv joiurd to til.- hviH.rliil. Five 

 species, ot which t«-.. ;.i. ■-. .i-;i,m -nl , rul:;.,,!. .1. 



These plants are r:, ' , ;■ : . i i .liilicult to 

 Howcr. Whengripwili i i ;:, '■ planted in 



well-drained conipoM .■ Id and 



sand, and carefully w.ntricl ., i - lipcome 



vigorous. Later liquid mamui i - I, : may br- 



given them in order to obtain I :i i -il.w.i- 



spikes. Liberal treatment will : ^ - > ina n^, 



but poorly fed plants often fail i.- il. v . i- ai ill. Wh.n 

 resting, they should be removed from tlie tropical 

 hciusc lo a cooler mom. P. e lata is often grown as a 

 purely terrestrial orchid. 



elata. TTook. Dove Flower. Holv Ghost Flower. 

 Fig. 1722. Psemlobulbs 4-5 in. high, bearing several 

 strongly veined Ivs. 2-3 ft. high: fl.-stem 3-4 ft. high; 

 lis. in a raceme covering about one-third the length of 

 the llc>wer-stalk..up shaped, creamy white, wax-like and 



fragrant, 2 in. .. r ■ ; -- | , '- la !I\ ..vate to rotund; 



petals nioi-e .!. ' . . 1 ,' ' ' , broadly obovate, 



tnun-ate, s|.nn. : ,1 I . ; ;: . ; la .lumn with large, 



.lune-Sept. "riui.uu.u j;.:.l..;llo. i.uy. 5:151. V. 8:10.-!! 

 (;n. 12. p. i:.:!; 'M, p. 571; 42, p. ;i24. R.H. 187G, p. 1.33; 

 lS77:ll(t —The labellum and wings of the column are 

 sometimes spotted with purple. 



p^ndula, Hook. Pseudobulbs ovnte.ol.li.i,.:'. 4-5 in. 



high, bearing lanceolate, stronaK .1 u-.: scape 



pendulous, from the base of till ■. iiariugas 



nuiiiy as 20 fls.: fls. globular m ,n. across, 



fragrant, gi-eenish white outsi.li . iiiili .1 « iili rose and 

 tliickly dotted with purple within; sepals roundish con- 

 cave, united at base; petals rather smaller; labellum 

 lli'shy, curiouslv shaped, enclosed within the flower. 

 Guiana. B.M. 3479. G.C. 11. 25:116.-Requires tropical 

 s in cult. 



ta Humboldtii, Lindl. 

 IIeinrich Hasselbrino. 



PERtSTROPHE fi;r..i.:. a..;, around, and strophos, 

 bell: a':i..iii ■ III ilii i.iM.hai. . h .1 iitliUceae. Erect 

 bran I I, , : . I : , or half-.shrubby 



gri ' 1 I rs. Lvs. entire: 



lis. ~i!!;ii i.|| ill i;i: ■- r- III J ; -urrounded by an 

 involucre, in loose cynuis or c\niose panicles, or di.stant 

 on slender branches; bracts of the involucre narrow; 

 cidyx deeply Sparted, shorter than the bracts, scariose 

 or hyaline; corolla-tube long, slender, slightly enlarged 

 above, limb deeply bilabiate, the imsteri'ir lij' luirrow, 

 erect, concave, entire or emarL-inai. , lnv. .i- lip spread- 

 ing, apex 3-parted; stamens 2, a Itiili' sinaii )■ tluin the 

 corolla lips; anthers 2-celled; stenk stann us none; 



81 



PERNETTYA 



style filiform: capsule oblong, contra' 

 stalk. About 15 species, raiv^HuL' frm 

 through the Malay LslainK am! .\ n 1 1 a 



The plants are cult, h! ' i 

 the same family. Cuttin. 

 wood is soft will root in a w.irm In i| m 

 which the potted plants nuiy be reniov 

 lower temperature. They require a 

 with some leaf -mold, and plenty of air 



1279 



1723, Peristrophe speciosa (X K). 



specidsa, Nees (Justicia specidsa, Roxb.). Fig. 1723. 

 Plants erect, spreading and branched, becoming 2-3 ft. 



high: Iv 



fls. inclii-;. !■- i 

 1% in. |i II . I 

 B.M. 27- ', 1.1 



bushy mii.ii I 



window. Usual 



angnistUdlia, 



branched: bran 



lvs. lanceolate, 



3yii 



tioled, ovate-acuminate, smooth: 

 ender branches, violet-purple, 

 ong period in winter. India. 

 15. B. 2:74. -A pot-plant of 

 ■n well grown. Good for the 



Flo 



var. atirea variegita has the ci-nii r ..i ili. ix.. varie- 

 gated with yellow. Useful for vases ami lia-k.l-. 



HeINUI' II IIASSEI.IIKING. 



PEEIWINKLE. ri»ca. 



PEBNfiTTYA (after A. J. Pemetty (1716-1801); he 

 accompanied Bougainville on his voyage and wrote "A 

 Voyage to the Falkland Islands"). JSriedcece. Ornamen- 

 tal low evergreen shrubs, with small, alternate, usually 

 serrate lvs. and small, white or pinkish, nodding fls., 

 usually solitary in the axils and followed by very deco- 

 rative berries varying in color from white to purplish 

 black or bluish black and remaining on the branches 

 all winter. These exceedingly pretty shrubs are great 

 favorites in England, but are little known in this coun- 

 try. P. mucronata and P. anguslifolia, the hardiest, are 

 probably hardy in sheltered positions as far north as 

 New York. They are well suited for rockeries and bor- 

 ders of evergreen shrubberies and also make very hand- 

 some pot-plants. They grow best in a peaty and porous 

 moderately moist soil and prefer sunny positions, but 

 seem to grow almost as well in any other well-drained 

 soil; in shade they will not fruit as profusely as in the 

 full sun. Prop, by seeds or by cuttings of half-ripened 



