ONI 



403 



R A 



each side of every two rows, to which a I Half-hardy herbaceous. Division. Sandy 



string is to be fastened throughout the loam and peat. 



whole length, a few inches below the j OPHIOXYLON serpentinum. Stove 



heads, to serve as a support and prevent ' evergreen shrub. Cuttings. Sandy loam 



their being broken down. The seeds and peat. 



are ripe in August, which is intimated 1 OPHRYS. Ten species. Hardy and 



by the husks becoming brownish; the half-hardy orchids. Seed. Chalky loam 



heads must then be immediately cut 

 otherwise the receptacles will open and 

 shed their contents. Being spread on 



and peat. 



OPLOTHFXA. Two species. 



O. florodana is hardy herbaceous, in- 



cloths in the sun, and during inclement] creased by division. 0. interivpta is a 

 weather they soon become perfectly stove biennial, by seed. Both require 

 dry, when the seed maybe rubbed out, , loam and peat. 



cleaned of the chalf, and, after remain- ! OPUNTI.\.. Eighty-seven species, 

 ing another day or two, finally stored. | Stove cacti, except 0. fragilis and 0. 

 It is of the utmost consequence to em- missouriensis, which are hardy ; and the 

 ploy seed of not more than two years | half-hardies, O. media, 0. polyacantha, 

 old, otherwise not more than one in and O.vxtlgaris. Slips, slightly dried; 

 fifty will vegetate. The goodness of! sandy peat. 



seed may be easily discovered by fore- I ORACH, Atriplex hortensis, is 

 ing a little of it in a hot-bed or warm cooked and eaten in the same manner 

 water a day before it is employed ; a , as spinach, to which it is much prefer- 

 small white point will soon protrude if red by many persons, although it be 



See Anthomyia and 



it is fertile. 



ONION-FLY 

 Eumfirus. 



ONISCUS. 0. asellus, O. armadillo. 

 Woodlice. 



The first is most easily distinguished 

 from the second by its not rolling up in 

 a globular form when at rest. They 

 are found in old dry dunghills, cucum- 

 ber frames, &c., and they are injurious 



longs to a tribe whose wholesonieness 

 is very suspicious. 



Soil and Situation. — It flourishes 

 best in a rich moist soil, and in an open 

 compartment. Those, however, of the 

 autumn sowing require a rather drier 

 soil. 



Soirins;. — It may be sown about the 

 end of September, and again in the 

 spring for succession. The sowing to 



to many plants, fruits, &c., by gnawing ' be performed in drills six inches apart, 

 off the outer skin. Gas lime will expel i The plants soon make their appearance. 



them from their haunts, and two boards 

 or tiles kept one-eighth of an inch 

 apart form an excellent trap. — Gard. 

 Chron. 



ONOBROjVIA. Five species. 0. 

 glaucum is a hardy annual, and O. ar- 

 borescens, a green-house shrub, the 

 others hardy herbaceous. Seed, cut- 

 tings, or divisions. Common soil. 



ONOBRYCHIS. Saititfoin. Twenty- 

 three species. Hardy herbaceous. Seed. 

 Chalky loam. 



ONOCLEA. Two species. Hardy 

 herbaceous. Seed and division. Sandy 

 loam and peat. 



ONONIS. Thirty-seven species. 

 Mostly hardy annuals and shrubby 

 j)lant3. Seed or cuttings. Loam. 



ONOSMA. Sixteen species. Hardy 

 herbaceous, except the stove O. triner- 

 vum. Seed. Rich chalkv loam. 



O N O S M O D I U M . Two species. 

 Hardy herbaceous. Seed. Rich light 

 loam. 



OPHIOPOGON. Three species. 



being of quick growth. When they are 

 about an inch high, they must be thin- 

 ned to six inches asunder, and those 

 removed may be planted out at the 

 same distance in a similar situation, and 

 watered occasionally until established. 

 At the time of thinning, the bed must 

 be thoroughly cleared of weeds, and if 

 they are again hoed during a dry day, 

 when the plants are about four inches 

 high, they will require no further at- 

 tendance than an occasional weeding. 

 For early production, a sowing may be 

 in a moderate hot-bed at the same time 

 as those in the natural ground. The 

 leaves must be gathered for use whilst 

 young, otherwise they become stringy 

 and worthless. 



To save Seed. — Some plants of the 

 spring sowing must be left ungathercd 

 from, and thinned to about eight inches 

 apart. The seeds ripen about the end 

 of August, when the plants must be 

 pulled up, and when perfectly dry rub- 

 bed out for use. 



