Pennyroyal 



( 175 ) 



Pentstemon 



PENNYROYAL. 



'I'lic Pennyroyal (Mentha Pulegium), a garden 

 herb, is occasionally asked for, and a few roots of 

 it should be included in the herb border. A native 

 of Britain, it is perfectly hardy. Propagation, by 

 division in winter or spring. The smallest pieces 

 will root. Plant in rows 12" apart, allowing t>" 

 between the plants in the rows. A north or even 

 a north-east border will suit it well. Soil, moist, 

 low-lying, sandy loam. (See ali<> MBNTHA.) 



PENTACH^ETA. 



Orcenhoii.su or hardy annual herbs (ord. Com- 

 positie). Propagation, by seed sown in spring in 

 a warm bonier. Light, rich soil. 



Principal Species : 



bellidillora, 2" to 3", sum., hdy., yel., heads 1" 

 across (*!/. a urea of Asa Gray). 



PENTADESMA. (BUTTER and TALLOW 

 TRUE.) 



A tall-growing stove tree (ord. Guttiferse). Propa- 

 gation, by ripened cuttings in sand, in a close 

 Frame, iii strong bottom heat, removing none of 

 the leaves. Soil, loam and peat in equal ratio, 

 with sand. The popular name is due to the thick, 

 yellow, greasy juice that exudes from the tree 

 when cut. 



Only Species :- 



butyracea, flowers red, large, and showy ; fruit 

 an edible berry. 



PENTAGONIA. 



Stove shrubs (iird. liubiaceaO with thick branches 

 and yellow, red, or green flowers. Wendlandii 

 may be treated like the Cinchonas, which see. 



Principal Species: 



Wendlandii, 2', Jy., yel. 



PENTAPERA. 



I'entapera sicula (yn. Erica sicula, ord. Erica- 

 cete) is a half-hardy evergreen Heath-like shrub, 

 witli pretty .pink or white flowers, and easily 

 grown. Increase is by cuttings. Soil, peat. 



PENTAPETES. 



One species, a showy stove annual (ord. Stercu- 

 liaceai). Propagated by seeds and cuttings of the 

 half-ripe shoots. Soil, sandy loam two parts, leaf 

 mould one part, and sand. 



Only Species : 

 phu'nicca, 2' to 3', Jy., suberifolia (now Ptero- 



st. , sc. spermum suberifolium) . 



PENTAPTERYGIUM. 



Epiphytal shrubs (iinl. Vacciniacese). Propaga- 

 tion, by cuttings, in sand, under a bell-glass, in 

 heat. Soil, fibrous peat, with sand. Baskets as 

 well as pots may be utilised. 



Principal Species : 

 flavum, 1' to 8', grh., yel., lng, pendulous (.w/. 



tipped red, 1" long, in Vaccimum rugosum). 



pendulous racemes. serpens, 2' to 10', grh., 



rugosum, I'to8',grh.,wh., hright red, flowers 



niarbledreddishpur.,1" numerous, rootstock 



tuberous ; the best. 



Pennywort or Pcnnylcaf (see Cotyledon, Umbilicus, 

 Bydrocotyle rvlyaris, Linaria (Jymbalaria 

 and Sibtharpia enropaa). 



Pentarcros (see Suettneria). 



I'fittahiplioi (see Litluapermnm). 



Pentapliragma (see Araitjia). 



Pentapliyllon (see Trifolinm). 



PENTARHAPHIA (*yn. CONRADIA). 



Stove branching herbs or sub-shrubs (ord. 

 Gesneraceae), some of which have very showy 

 flowers. They like the same cultural treatment 

 as the Gesneras, which tee. 



Principal Species : 

 floribunda, dwarf, sum., Miii/aziHe 4380, and 



suh-shr., red, numerous. Khytidophyllum flori- 



libaneusis, 4", Je., sub- bundum). 



shr. ,crim. (./*. (jesnera lougiflora, dwarf, sum., 



libaneusis of tiotiinical aut., shr., sc. (*//>*. Oon- 



radia ventricosa). 



Other Species : 

 Crauiolaria, 3' to 4', sum., cubensis, 2', sum., sc. 



grn., yel. (si/n. Crauio- neglecta, 4", Sep., snb- 



laria fruticosa). shr. 



PENTAS (ujn. OBTHOSTEMMA and VIG- 



NALDIA). 



Stove herbs and sub-shrubs (ord. Kubiacese). 

 Few species have been introduced. Propagation, by 

 cuttings of young shoots in sandy soil in a close 

 propagating case. Soil, loam two parts, leaf mould 

 one part, with sand. The rammer should not be 

 used, and rather small pots give the best results. 

 The young plants need to be pinched. Nothing is 

 brighter in the stove in the dull months than 

 carnea and its beautiful varieties kermesina and 

 quartiniana. 



Principal Species and Varieties : 

 carnea, IV, aut., win., quartiuiaua, pk.; more 

 spr., sub-shr., flesh pk. rtoriferous than the 



kermesina, ro., tinted species, 

 vio. 



Other Species : 



parviflora, 2', Ap., suh-shr., sc. 



PENTHORUM. 



Hardy, erect, perennial herbs (ord. Crassulacese), 

 allied to the Sempervivuins, like which they may 

 be treated. 



Principal Species : 



sedoides, Jy., Sep., greenish yel., likes moist places. 



PENTSTEMON. (BEARD TONGUE.) 



Description. A genus of hardy or half-hardy 

 perennials (ord. Scrophularineso) of herbaceous or 

 sub-shrubby habit, many of the species being fine 

 border or rockery plants. The hybrid Pentstemons, 

 derived principally from Cobcea and Hartwegii, are 

 very handsome. 



Propagation. By seeds sown in spring in pans, 

 pots, or boxes, or in frames ; the varieties by 

 cuttings in early autumn in frames, using sturdy 

 side growths. These are wintered in a cold frame, 

 and planted in spring. The sub-shrubby species 

 are also propagated by cuttings or division. Nearly 

 all are best propagated annually. 



Soil. For the varieties, a rich, well-manured 

 soil, with plenty of water while growing. Most 

 Alpine species like a peaty soil among stones. 



Principal Species and Varieties : 



azureus, 1', Aug., hdy., bl. confertus, 9" to 18", Jy., 



j.-itVr.-iyanus, hdy. hdy., yel. 



barhatus, 3', Jy., hdy., creruleo - purpureus, 



sc. (SI/H. Cheloue bar- hdy., bl., pur. (xijn. 



bata). procerus). 



Torreyi, sc. (.?//. Tor- glaber, 1', Aug., hdy., 

 reyi). pur. or bl. (/* Gor- 



Coboea, 1' Aug.,hlf-hdy., doni and erianthera). 



pur. to wh. cyauanthus, 2V, Aug., 



purpurea, fine var. hdy. , pur. , bl. 



