Pomax 



( 22G ') 



Populus 



POMAX. 



A greenhouse evergreen (ord. Rubiacese). Propa- 

 gation, by cuttings in very sandy peat. Soil, loam 

 three parts, fibrous peat one part, and sand. 



Only Species : 



umbellata, 1', Jy., greenish wh. (syns. hirta and 

 Opercularia umbellata). 



POMEGRANATE (.- PUNICA). 



POMMERESCHIA. 



A rarely cultivated genus of stove plants (ord. 

 Scitaminese). The only species is Lackneri, 1J', 

 summer, yellow, a foliage plant much resembling 

 Phrynium, and needing similar treatment. 



POMPON. 



In horticulture this term is used to indicate a 

 certain class of Chrysanthemums and Dahlias 

 which have more or less rounded or tuft-like heads 

 of flowers. The fancied resemblance between these 

 small, compact bloom heads and the ornaments 

 formerly used on military helmets probably led to 

 the adoption of " pompon " as a class title. 



PONDS. 



These are areas of water of any size that may be 

 naturally or artificially formed. They are very 

 desirable adjuncts to a garden, as in them may be 

 grown numerous aquatic plants, while their con- 

 tents will be 1 found of inestimable value during the 

 prevalence of drought, as the water will be softened 

 by exposure and hence more valuable than that 

 drawn from taps. In the artificial formation of 

 ponds puddling with clay is resorted to. An 

 excavation of the requisite size is made, allowing 

 for the puddling. The sides should be puddled to a 

 thickness of 1J', and must have a gentle downward 

 slope ; the bottom must be similarly lined, but 1' 

 depth will suffice if the mass is properly pounded 

 down. Care must be taken to have a substantial 

 backing for the sides, or they will break away. 

 The sides may advantageously be covered with a 

 few inches of gravel. A more permanent method 

 of forming ponds is to concrete the sides and 

 bottom, but it will be found considerably more 

 expensive. 



PONERA. 



Epiphytal stove Orchids (ord. Orchidacese), of no 

 horticultural value and rarely cultivated ; even in 

 botanical collections they are seldom represented 

 by more than one or two species. 



Principal Species : 

 amethystina, H', sum., Kienastii, 6", Sep., green- 



wh. , bluish pur. ish br. (now Scaphy- 



juncifolia, 1', sum., buff. glottis Kieuastii). 



PONGAMIA. 



Evergreen stove climbers and shrubs (ord. Legu- 

 minosse). Propagation, by cuttings of firm growths 

 in spring, in heat. Soil, equal parts fibrous peat 

 and loam, with coarse sand. 



Principal Species : 



glabra, 10', Je., wh., red. marginata, 3', My., yeL 

 gramliflora, 6', My., wh. (now Derris cunei- 



folia). 



Pommelo (see Citrus deeumana). 

 Pompiim (see Cucurtita). 

 Pondmeed, Cape (see Aponagcton distae/iyori). 

 Pontia (see Pieris). 



PONTEDERIA. 



Hardy and stove aquatics (ord. Pontederiaceae). 

 (See also EICHORNEA.) Propagation, by division. 

 Soil, mellow loam, in a tub or shallow cistern of 

 water. 



Principal Species : 

 coerulea, '!' ', Jy., bl. 



PONTHIEVA. 



cordata, '2' to 4', Jy., 

 hcly., bl. 



A genus of terrestrial stove Orchids (ord. Orchid- 

 aceae). The small flowers are borne in erect 

 spikes. Compost, equal parts of fibrous loam and 

 peat, with coarse sand and finely broken crocks. 

 Afford ample drainage. Place on a shelf and 

 keep dry during the resting period. 



Principal Species : 



glaudulosa, l',spr., green- petiolata, H', sum. , light 

 ish wh. yellowish br 



maculata, 1', spr., sum., 

 br. , wh. , yel. 



POPPY ( PAPAVER). 



POPULUS. (POPLAR.) 



Hardy deciduous trees (ord. Salicineje), of con- 

 siderable ornamental value and some economic 

 properties. The small green flowers are borne in 

 catkins, in March and April. The majority are 

 quick growers, suitable for screens. Propagation, 

 by seeds, cuttings, layers, and suckers ; grafting 

 for weeping and other varieties. Soil, deep, moist 

 loam preferably. The trees resent stagnant 

 moisture. 



Principal Species and Varieties : 



alba, 60' to 100'. (iood 

 vars. are nivea (si/us. 

 acerifoliaandargentea'), 

 pyramidalis (syits. hol- 

 leana and Korolkowi), 

 macrophylla (*#//. Pi- 

 carti), and foliis aureis 

 variegatis. Abele, or 

 White Poplar. 



balsamifera, 70', Ivs. 

 tapering and pointed. 

 Candicaus and varie- 

 gata are vars. Balsam 

 Poplar. 



caiiesceus, 80', Ivs. hoary 

 beneath when young. 

 Grey Poplar. 



deltoidea, 80' to 100', Ivs. 



heart shaped (xt/i/x. 

 caiiadensis, cordata, mo- 

 nilifera,etc.). Best vars. 

 are aurea (syns. caua- 

 densis aurea and van- 

 houtteaua), and erecta 

 (*>/)IK. canadensis erecta 

 and monilifera erecta). 

 Xecklace Poplar. 



grandidentata, 60' , Ivs. 

 deeply toothed. 



iiigra, BO'. Black Poplar. 



pyramidalis, distinct 

 (xifitx. dilatata,, f astigiata 

 and pyramidalis). Loui- 

 bardy Poplar. 



tremula, oO' to 80 , grey 

 bark. Aspen (seep. 22.")). 



Other Species and Varieties : 



acerifolia (sec alba var. 



nivea). 

 argentea of gardens (- 



alba var. nivea). 

 bolleana (see alba var. 



pyramidah's). 

 cauadensis (see deltoidea). 

 cordata (see deltoidea). 

 dilatata (ste nigra var. 



pyramidalis). 



fastigiata (nee nigra var. 



pyramidalis). 

 gncca (see tremuloides). 

 heterophylla, 40' to 60', 



Ivs. large, hoary wheii 



young. Pendula and 



villosa are vars. 

 Korolkowi of gardens (see 



alba var. pyramidalis). 

 laurif olia. 70' , Ivs. Laurel 



Pop Corn (see Maize and Xrii). 



Pope's Head (see Meloenctus). 



Poppy, Californian (see Pint ystemon, califor- 



niciMii). 



Poppy, Corn (see Papavcr Rha-as'). 

 Poppy, Horned (see Glaucium luteiim~). 

 Poppy, Mallow (see Callirkoe). 

 Poppy, Mexican (sec Argemone). 

 Poppy, Opium (see Papawr somniferum). 



