1338 



PILOCEREUS 



7. Houll^tu, Lem. Trcv-likc-, attuiiiii 

 branches divaricate ; culii\;i^'l i !,ini 

 diam: ribs 6-8, miiinl' 1. - i . : il spines 7-11, 



spreading yi in. I. in-. Ii ii i.iial twice as 



long and stronKcr : anol.r .ii ih. -n i i ir ,i,iii witli more 

 or less liairs, which m tlic truituii; iin-a art^ very numer- 

 ous, making a shaggy tract sometimes 1 ft. long: fls. 3 

 in. long, imbedded in the wool, turbinate, greenish red 

 outside, rose-red within: fr.dark red, depressed-globose. 

 Mexico. R.H. 1862, pp. 427-430. 



AAA Fruiting aiea a prominent cephalium composed of 

 denie locks of woolly hairs intermixed with 

 bri'^tles, unilateral except sometimes in P. 

 thiy .mallus 

 B L iKi h iiri absent except m the cephalium. 

 8 Columna Trajini, Salm Dj ck Tree-like, attaining 

 a height of jO tt and a diam of over 2 ft., simple below: 

 areolae large, elliptic ; radial 

 spmes 10-12, the upper very 

 short the lower longest, nearly 

 an inch long ; centrals 2, the 

 upper an mch long, the lower 

 4-5 m fls. about 2 in. long, 

 scarceh projecting from the 

 unilateral woolly and bristly 

 crphalmra Mex. R.H. 1890, p. 

 1 I The specific name refers to 

 ih famous Trajan's Column. 

 I u Long hairs covering all but 

 the oldest parts of the 

 plant 

 q chrysomAUus, Lem. Tree- 

 like with elect branches, reach- 

 Ill, a height of JO ft.: ribs in 

 cultivated plants 13: areolae 

 w ith long h iirs , radial spines 

 U-H the upper % m. long, the 

 1 w r t\\icp as long, centrals 4, 

 till I H.,'ti all the spines am- 

 I I \ II w becoming brown: 

 1 1 Uiiini terminal or some- 

 tiim h unilateral, a foot long, 

 « ) >lly and setose Mex. 



10 senilis, Pfeiff Old Man 

 C V( TUS. Columnar, reaching a 

 blight of 35 ft and a diam. of 

 1 ft , branching at the very 

 base, the branches becoming 

 parallel with the parent: ribs 

 20- )0 ver> little ele\ ated : areolre 

 l)eiiin„' 20 to 30 white, wavy 

 bustlts l-'i m long; later ap- 

 pe ir also at tirst 1, then 3-5 

 strong \ellowish spines: fls. 

 veiy numerous in the cephal- 

 ium, nearly 4 in long, red out- 

 side, reddish white within: fr. 

 violet, 2 in long Central Mex R H 1889 p. 568; 1890, 

 p 128 



11 Dautwiztli, Haage (P jffnaffft, Poselg.). Colum- 

 nar, reaching 5 ft in height, 4 in m diam ribs 25-30. 

 low, obtuse . areolae close together, bearing over 20 

 needle-like, spreading and interlocking spines, and also 

 copious long, white, curled hairs which cover the whole 

 upper part of the plant, like a spider's web: cephalium 

 and fl. not certainly known. Northern Peru. G.C. 1873:7. 

 F.S. 21:2163. 



AAAA. Fruiting areolw and younger parts of the plant 

 bearing short hairs, but cephalium wanting, 

 12. exdrens, Schum. {P. vlrens, Lem.). Branching at 

 base, 3-4 ft. high, 2-3 in. in diam., taperins; abnvc: 

 ribs 4-6, obtuse, the sterile shoots with sIhuI, spaisr, 

 woolly hairs at the top; spines commonly 7 ia<liaN, 

 very short, 1-3 centrals 4 times as long; woi.lly liairs 

 much more abundant on the blooming plant: lis. about 

 3 in. long, trumpet-bell-shaped, without wool or spines. 

 ^■■^^'l- Katharine Brandegee. 



n height: PILtTMNA. See Trichopili 



Schottii 



PIL6GYNE. 



Melnthria. 



PIMELEA (Greek, fat; referring to the fleshy seeds). 

 ThiimelaAveoe. Rice Flower. A genus comprising 

 many showy species, and confined almost exclusively 

 to Australia and neighboring islands. They are mostly 

 delicate shrubs, fitted only .for greenhouse culture, 

 though reported to be hardy in the open wherever the 

 lemon can be successfully grown. Lvs. nearly always 

 opposite, always simple and entire: inflorescence usu- 

 ally a t.iiniiial licail or cluster, never umbellate, often 

 witli all in\<iiiMir i.f 4 or more bracts at the base: per- 

 iantli tiilHilar. wiili a spreading (rarely erect) 4-lobed 

 linili: stain, lis L', inserted in the throat opposite the 2 

 outer perianth-lobes: ovary 1-celled: fr. a small drupe. 

 Of the many species, only three (P. decussata, P. Ii- 

 ijustrina and P. spectabilis) have been actually intro- 

 duced into the U. S., but there are so many other very 

 showy species, some of which are already in the Old 

 World, that in all probability more will soon be found 

 in our collections for greenhouse culture. For the lat- 

 ter the soil should be a mi.xture of peat and loam, with 

 enough sharp sand added to make it "gritty," and spe- 

 cial care given to insure perfect drainage. After bloom- 

 ing, the plants should be cut back severely to stimulate 

 new growth. They can be propagated from either seeds 

 or cuttings. Ernest Braunton writes: "P. decussata 

 is an elegant little shrub, of uncertain existence. In 

 southern Calif, it attains a height of 3 ft., with the 

 same width at the top, flowers magnificently and then 

 dies. In northern Calif, it does the same. In the open 

 ground it lives 3-5 years, and must have shade." 



Arnold V. Stcbenracch. 



Cuttings of well-ripened wood of P. spectabilis and 

 P. decussata root freely at 60° placed under a bell-glass, 

 in a shaded house. They are not strong growers and 

 must not be over-potted. During the summer they do 

 best when plunged outside but covered with lath racks. 

 They may be kept with auriculas. During the winter 

 they may"be kept with ericas at 40-45° at night, and they 

 will come in at Easter without forcing. They are rather 

 slow-growing plants for a commercial man, but they 

 probably will become profitable. P. decussata, espe- 

 cially, is one of the finest of pink greenhouse shrubs. 

 H. D. Darlington. 



The following are all natives of Australia, except 



ligustrina, 4. 

 linifolia, 7. 

 longiflor.i, 1. 



A. Ivriili(r,;il Irs. ,,hsr,,f l.Iongiflora 



AA. Inrnhiriitl Irx. n,h(rnl to 'J slllilll 



bnii-ix 2. drupacea 



AAA. Inmlncriil Irx. l-S. 



B. I/VS. distinctly penniveined. 



c. Fls. white 3. hypericina 



4, ligustrina 

 cc. Fls.rose-coloredoryellowish. T). suaveolens 

 HE. Lrs. not penniveined or verij 



<:. Colornfnirnlncral Irs.greni. 

 I,. Fls. whil,'. 



E. Perianth-tube cylindri- 

 cal 6. glauoa 



7. liniJolia 

 EE. Perianth-tube wider at 



top 8. graciliflora 



EEE. Perianth-tube narrowrr 



at top 9. arenaria 



DP. Fls. rose-colored. 



E. Perianth-tube cylindri- 

 cal 10. rosea 



EE. Perianth-tube wider at 



top 11. sylvestris 



I.nn. Fls. white and pink in 



same head 12. nivea 



