2624 



PILOCARPUS 



PIMELEA 



entire, coriaceous, pellucid-punctate: petals ovate or 

 oblong-ovate, acute; filaments subulate: fr. a dark 

 brown or blackish follicle; seeds glabrous. W. Indies. 

 Intro, into Calif. 



P. Jabordndi, Holmes, has been described as P. pennatifolius, 

 by Bentl. & Trim., but is distinguished from it by shorter Ivs. 

 and Ifts., stiffly pubescent branchlets and sts., more openly fld. 

 racemes, with slender rachis and pedicels, and the presence of 2 

 inconspicuous bracteoles above the middle of the fl.-pedicels. B.M. 



ARNOLD V. STUBENRAUCH. 



F. TRACY HuBBARD.f 



PILOCEREUS of the "Cyclopedia of American Hor- 

 ticulture" is mostly Cephalocereus. P. Celsidnus=Oreo- 

 cereus. P. chrysomallus and P. Columna-Trajani = 

 Pachycereus. P. Dautwitzii=Oreocereus. P. Houlletii, 

 Auth. = Cephalocereus Sartorianus. P. Schdttii 

 Lophocereus. P. Strausii=Oreocereus Celsianus. 



PIL6GYNE: Melothria. 



PILULARIA (Latin, a little ball, alluding to the shape 

 of the involucres). Marsileaceae, one of the fern allies. 

 Small aquatic plants, sometimes used in ponds: root- 

 stock filiform, creeping, rooting at the nodes: barren 

 fronds reduced to filiform stipes, few or clustered at the 

 nodes: involucres solitary at the nodes, sessile or shortly 

 stipitate, globular: sori 2-4, vertically adnate. About 

 6 species, Eu., W. Asia., Austral., New Zeal., and N. 

 Amer. 



globulifera, Linn. Rootstock creeping under water, 

 often to a considerable extent: barren fronds filiform, 

 bright green, like the Ivs. of Isoetes, 1-3 in. long, 

 usually few together at the nodes: involucre about the 

 size of a pea, slightly hairy, sessile or borne on very short 

 erect or recurved stipes. Eu., W. Asia, and Austral. 



PILtJMNA: Trichopilia. 



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

 Thymelaeaceae. RICE-FLOWER. Mostly shrubs, fitted 

 for greenhouse culture, although reported to be hardy 

 in the open wherever the lemon can be grown suc- 

 cessfully. 



Woody, or rarely herbaceous, with small opposite or 

 alternate, always simple and entire Ivs. : inn. usually a 

 terminal head or cluster, never umbellate, often with 

 an involucre of 4 or more bracts at the base: fls. her- 

 maphrodite or functionally dioecious, white, pink or 

 reddish, small but showy in the clusters and the bracts 

 are often colored; perianth tubular, with a spreading 

 (rarely erect) 4-lobed limb, the throat sometimes folded 

 or thickened but without scales; stamens 2, inserted 

 in the throat opposite the 2 outer perianth-lobes; ovary 

 1-celled: fr. a small drupe, included in the base of the 

 perianth. Austral, and New Zeal. Of the 80 or more 

 species, only 3 or 4 (as P. ferruginea, P. ligustrina and 

 P. spectabilis) are much known in cult, here, but there 

 are other very showy species, some of which are grown 

 in the Old World. 



These fine evergreen shrubs may be increased readily 

 from cuttings of the young half-ripened shoots in March. 

 Make these cuttings 2 to 3 inches long and place in 

 pans, leaving about an inch between the cuttings. The 

 pans should be filled with a mixture of loam, peat and 

 silver sand in equal parts. See that the pans are well 

 drained. Place where they may have a temperature of 

 55 to 60 and keep covered with glass. See that they 

 are shaded and moist, and they will soon root. When 

 they have made a fair amount of roots, they may be 

 potted up into small pots, using a mixture of fibrous 

 loam, fibrous peat, and leaf-mold in equal parts, with 

 enough of sand to keep the compost open. Be sure that 

 each pot has plenty of drainage as this is necessary for 

 their welfare. They should be grown in a house where 

 they will get a fair amount of ventilation in the summer 

 and be shaded. The atmosphere should be kept moist 

 by damping down, and the plants should have a good 

 syringing every bright day. In the summer they should 



have the tops pinched. The pots may be placed on 

 ashes, and this will help to keep them moist. They are 

 slow-growing plants, and therefore will need but one 

 shift during the summer. When they have filled the 

 pots with roots, they may be shifted into 3- or 4-inch 

 pots, using the same mixture. When the autumn 

 comes, they should be given more ventilation, to ripen 

 up whatever wood they have made. In autumn they 

 may have a temperature of about 50 at night with 

 about 10 rise with sun heat. They will do well in 

 about 45 for a winter temperature, with about 55 to 

 58 on bright days. In winter, give great care to water- 

 ing so they will not become too wet, just keeping in a 

 nice moist state. By February they may have any 

 necessary potting, using a mixture of fibrous loam four 

 parts, fibrous peat one peat, leaf-mold and well- 

 decayed cow-manure one part each, and enough clean 

 sharp sand to make it porous. Pot firmly. They may 

 now be given a temperature of 50 during the night 

 with about 65 on bright days and by April they should 

 be standing 5 to 8 more. They will now need a shift 

 into 5- or 6-inch pots, and give them a pinch back 

 when they have made a little growth. In summer 

 they may have the strongest growths tied out in a 

 horizontal position. Give the same culture as advised 

 for the previous summer and by the next spring the 

 plants should flower. For established plants, they will 

 require heading in after they are through flowering and 

 encouraged to make growth freely during the summer. 

 Give these plants plenty of syringing as they are liable 

 to be affected with red-spider; their treatment year 

 after year will be similar to that mentioned before, only 

 with larger shifts and to be assisted by weekly applica- 

 tions of liquid manure to give them renewed vigor. 

 (J. J. M. Farrell.) 



INDEX. 



arenaria, 10. 

 cernua, 16. 

 decussata, 14. 

 diosmifolia, 14. 

 drupacea, 2. 

 ferruginea, 14. 

 filamentosa, 8. 

 glauea, 7. 

 graciliflora, 9. 



humilis, 7. 

 hypericina, 4. 

 imoricata, 3. 

 incana, 13. 

 intermedia, 7. 

 involucrata, 8. 

 ligustrina, 5. 

 linifolia, 8. 

 longiflora, 1. 



nivea, 13. 

 pqludosa, 8. 

 piligera, 3. 

 rosea, 11. 

 spathulata, 16. 

 spectabilis, 15. 

 suaveolens, 6. 

 sylvestris, 12. 



A. Involucral Ivs. absent. 



1. longifldra, R. Br. Sts. 4 ft. or more high, slender, 

 erect, very leafy: Ivs. sometimes alternate, linear, 

 hairy: fls. pure white, hairy externally, long and slender; 

 heads globose, many-fld.; perianth silky; anthers yel- 

 low, not exserted. W. Austral. B.M. 3281. 



AA. Involucral Ivs. reduced to 2 small bracts. 



2. drupacea, Labill. A straggling shrub 6-8 ft. high 

 or lower: branches leafy: Ivs. ovate to oblong-elliptical 

 or oblong-linear, glabrous above, slightly silky hairy 

 beneath, distinctly pennivemed: fls. white or tinged 

 with pink, silky hairy ; anthers yellow, hardly exserted : 

 heads sessile, few-fld.: fr. a red or black drupe. Vic- 

 toria, Tasmania. L. B.C. 6:540. 



AAA. Involucral Ivs. 8, or usually more than 8. 



3. imbricata, R. Br. Small erect shrub, much 

 branched, from less than M-l^ ft. high, usually 

 clothed with long, silky hairs, but sometimes glabrous : 

 Ivs. usually crowded, alternate or opposite, oblong- 

 lanceolate to linear; involucral Ivs. similar to stem- 

 Ivs., much shorter than fls.: fls. white, outside hairy; 

 tube cylindrical, heads terminal, globular, many-fld. 

 W. Austral. B.M. 3833 (as P. nana, and which is 

 included under var. piligera in Fl. Austral.). 



AAAA. Involucral Ivs. 4~8- 



B. Lvs. distinctly penniveined. 



c. Fls. white. 



4. hypericina, A. Cunn. St. erect, slender, to 8 or 

 10 ft. high: branches not very leafy: Ivs. opposite, 



