Osmunda 



( 148 ) 



Ostrya 



beneath a bell-glass. Soil, loam and peat in equal 

 parts, with plenty of sand. 



Principal Species : 



Bellidiastrurn, 1', Je., wh. caraphorina, H', My., wh. 

 dentata, li', My., wh. 



OSMUNDA. 



Description. Handsome and stately Ferns (ord. 

 Filices), either hardy or needing greenhouse pro- 

 tection. The rich brown sporangia are borne in 

 large clusters, often at the apex of the fertile 

 fronds, producing at a short distance an effect not 

 unlike that of some flowering plant, and which has 

 gained for them the title of Flowering Ferns. 



Cultural Points. Propagation is by spores. 

 Plenty of root room and a large supply of 

 moisture at all seasons are essential for the pro- 

 duction of fine specimens. The hardy species do 

 best in semi-shade, regalis being a grand plant for 

 stream and lake sides, or boggy places. Substan- 

 tial loam, with some peat and sand, forms a suitable 

 compost for pot plants. Regalis, when uprooted, 

 divided, and replanted, takes two or three years to 

 properly recover from such disturbance. 



Principal Species and Varieties : 

 bipiimata, fronds H' to spectabilis). Found wild 



in Wales, Ireland, De- 

 von, aiid Cornwall, the 

 grandest native Fern. 

 There are several vars. 

 The Royal Fern. 



corymbifera, '2', forked 

 pinna;, a good pot 

 plant. 



cristata, 3', with tips 

 of pinna3 finely crested. 



gracilis. 



palustris, 3', light grn., 

 young Ivs. red, fine for 

 cool rock fernery (m 

 figure). 



purpurascens, of 

 darker colour and lower 

 stature than the type. 



palustris (see regalis var.). 

 presliana (nee javanica). 

 Vachelh'i (see javauica). 



2' long, grh. 



cinnamomea, 2' to 4', 

 grh., young plants and 

 fronds have a brownish 



I down that is very effec- 

 tive ; augustatum is a 

 dwarf form. 



claytoniaua, 3'. fronds 6" 

 to 12" broad, cool grh. 

 (syn. interrupta) ; a 

 handsome species. 



javanica, 2' to 4', warm 

 grh. ()/. presliana 

 and Vachellii) ; the fer- 

 tile pinnse are the 

 central or lower ones. 



regalis, 2' to 8' (syn. 



Other Species : 

 corymbifera (sen regalis 



var.). 



humilis, li'. 

 interrupta (see clay ton - 



iana) . 



OSS/E A (syn. SAGR^A). 



Stove evergreen shrubs (ord. Melastomacea:). 

 Propagation, by cuttings in sandy peat beneath a 

 bell-glass over bottom heat. Soil, fibrous loam and 

 sandy peat. The species are numerous, but they 

 are not commonly grown. 



OSTEOCARPUS. 



Greenhouse sub-shrubs (ord. Convolvulacese). 

 Propagation, by seeds and division. Soil, peat, 

 loam, and sand. 



Principal Species : 



rostratus, 2', sum., bl. (syn. Alona rostrata). 



OSTEOMELES. 



Hardy and half-hardy evergreen trees and shrubs 

 (ord. Rosaceaa). Propagation, by seeds, cuttings, 

 and layers. Soil, deep, fertile loam. 



Principal Species : 

 anthyllidifolia, 3', sum., ferruginea, Jy. 



grh., wh., anthers yel. 



Otmodium (tee Onoimodium). 



OSTEOSPERMUM. 



Greenhouse evergreen South African shrubs or 

 sub-shrubs (ord. Compositor). Propagation, by 

 cuttings beneath a bell-glass in spring. Soil, 

 sandy loam and fibrous peat. The genus is seldom 

 cultivated in this country. 



Principal Species : 



corymbosum, 3', 

 yel. 



Aug., 



ilicifolium, 4', Jy., yel. 

 mouiliferum, 3', Jy., yel. 



OSTROWSKIA. 



A handsome hard}' perennial (ord. Campanu- 

 lacese), that responds to much the same treatment 

 as Campanulas. It must, however, be grown in a 

 spot sheltered from strong winds, but in no way 

 shaded. A deep, but light and rich soil, suits it. 



to 6" across, light bl., 



OSMUNDA KEGALIS PALUSTKIS. 



Carefully support each growth and give water 

 during dry periods, as any special attention given 

 is amply repaid by this fine species. The flowers 

 are campanulate and very large, and though some- 

 what fugitive, this is atoned for by the number 

 produced in succession. In cold districts it is best 

 treated as a cool greenhouse plant. 



Only Species : 

 magnifica, 3J' to 5', 

 Jy., Aug. 



OSTRYA. (Hop HOBNBEAM.) 



Hardy deciduous trees (ord. Cupulifenc). Prop- 

 agation is by seeds, layers, and cuttings, or grafts 

 on the common Hornbeam. Soil, deep loam. A 

 moderately moist situation is also desirable. 



Principal Species : 



carpinifolia, 20', My., of Carpinus Betulus, 



gru., wh. (si/us, italica, named incisa). 



vulgaris, and Carpinus virginica, 20', Ap., My., 



Ostrya). grn., wh. (VI/HX. virgin- 



quercifoha (this 18 cor- iana, Carpinus triHora 



rectly a cut-leaved form and C. virginiana). 



