Onoclea 



( 135 ) 



Onychium 



garden soil will suit, although the best Sainfoin 

 comes from rich, loamy soils. 



Principal Species : 



Caimt-galli, U ', Jy. , Inly., 



flesh pk. (.-//. Hedy- 



sarum Caput-galli). 

 laconica, 1', sum., hdy. , 



bright pk. 

 radiata, IV, Je., hdy., 



yellowish wh., red. 

 sativa, 2' to 3', sum., 



hdy., red, wh. (ni/n. 



viciivfolia). Common 



Sainfoin. 

 inontana, a pretty, 



low growing var. , suit- 

 able for the rockery ; 

 ro. pur. 



ONOCLEA. 



Effective and pretty hardy Ferns (ord. Filices), 

 which thrive in good soil, especially where moist, 

 as by the margin of a stream or pond. They are 

 easily propagated by means of their stolons, which 

 ramble about freely in suitable positions, and may 

 be removed in spring or autumn. One part of leaf 

 soil and three of fertile loam will suit them well. 



Principal Species and Varieties : 



germaiiica, 'I' to 3'. A orieutalis, 2'. A fine 



very ornamental species species (;/. Struthi- 



(syns. Struthiopteris opteris onentalis). 



germaiiica and pemisyl- sensibilis, H' to 3'. An 



vanica). Ostrich Fern. effective plant. 



recurva, edges of - obtusilobata, a rare 



fronds rururvrd. and pretty form. 



ONONIS. 



A large genus (ord. Leguminosse) of hardy 

 annual, biennial, or perennial herbs, or shrubs. 

 Several species make charming rock plants, and 

 amongst them may be noted the pretty British 

 Kest Harrow. Propagation is by seeds, which are 

 best sown in spring ; also by division of the root in 

 autumn or spring for the perennial herbs. Almost 

 any fairly fertile soil will do, but arvensis likes a 

 high and well-drained situation. 



Principal Species and Varieties : 



aragoueusis, 1 J ' , My . , Je. , hispanica, 1 1 ' , Jy . , hlf - 



hdy. shr., yel. hdy., yel. (;/. his- 



arvensis, G", sum., hdy., panica of Jlotanical 



ro., wh. ; procumbent Magazine 2450). 



(s^. spinosa). Rest rotundifolia, 1' to 1J', 



Harrow. sum., hdy. slir., ro. 



Natrix, 1J' to 2', sum., splendeus, larger and 



hdy. per., yel., veined more richly coloured 



red. Uoat Boot. flowers. 



Other Species : 



fruticosa, 1' to 2', sum., 



hdv. shr., pur. (tee p. 



136). 

 mimitissima, 3", Je., hdy. 



hdy. herbaceous per. , 

 wh. 



viscosa, 14' to 3', sum., 

 hdy. ann., yel., striped 

 pur. 



bien., vol. 

 peduncularis, 1 , Ap.,hlf- 



ONOPORDON. (COTTON THISTLE.) 



Annual, biennial, or perennial herbs (ord. Com- 

 posita:), with winged stems, and, in some cases,, 

 showy heads of flowers. Seeds may be sown in 

 well-drained soil in spring. Several of the species 

 do well in tho wild garden, but they are rather too 

 weedy-looking for the herbaceous border. Ordinary 

 garden soil. 



Principal Species : 



Acanthium, 4' to 5', Jy., bien., pur., Ivs. more 

 hdy. per., pur. The deeply cut and spiny 

 best of all. Common than those of Acanthi- 

 Cotton Thistle. um (syns. elongatum 



illyricum, 6', Jy., hdy. and horridum). 



Other Species : 

 arabicum, 8', sum., hdy. 



bieii., pur. 

 bracteatum, 6' to 9', sum., 



hdy. bien. or per., pur. 



elongatum (we illyricum). 

 horridum (xre illyricum) . 

 ffiacrocanthum, 6', Jy., 

 hdy. ami., pur. 



ONOSERIS. 



Perennial herbs and shrubs (ord. Composites). 

 Very-few of the species have been introduced to 

 this country, and even those which have are not 

 well known. Propagation is by seeds, and the soil 

 must be light and rich. 



Principal Species : 



adpressa, 1' to 2', Je., purpurata, grh. per. , pur. 



Dec., st. shr., ro. pur., reflexa, 1J' to 2', late aut., 



yel., fragrant; branches at. ann., ro. pur., yel., 



wh., woolly. fragrant (tyn. Centro- 



drakeaua, grh. shrubby clinium reflexum of 



per., bright pur. Botanical Magazine 



3114). 



ONOSMA. (GOLDEN DROP.) 



The Unosmas are among the prettiest of perennial 

 rockery plants (ord. Boraginese), and are easily 

 grown in a light, sandy soil, in a sunny position. 

 In wet districts they ought to be protected from 

 winter rains by a sheet of glass or a slate over- 

 head, giving them, however, all the air possible. 

 They are propagated by seeds or cuttings. Albo- 

 roseum should be propagated by cuttings annually, 

 as it is a short-lived plant. All make good plants 

 for the Alpine house. 



Principal Species : 



albo-roseum, 6", Bum., simplicissimum, 1', Ap., 



wh., ro. yel. 



Bourgsei, 6", sum., yel, stellulatum, 6", My., 

 echioides, 1', My., yel. hdy., yel., citron, wh. 



pyramidalis, 1', Sep., grh. tauricum, yel. 



or hlf -hdy., sc. Thomsoui, 6 , sum., yel. 



ONOSMODIUM. 



About six species of hardy herbaceous perennials 

 (ord. Boragineas), of upright habit. They are 

 closely related to the Onosmas, and should be 

 treated like them. Very few of the species have 

 been introduced, and even these are rather rare in 

 cultivation. 



Principal Species : 



caroliniamun, 1', sum., ense, by Index Kew- 



hdy. , yellowish wh., ensis. 



drooping. Carolinian- virginianura, 1', sum., 



um of De Candolle is hdy., yel.; plantcovered 



referred to molle, and with bristly hairs, 

 that of Torr. to bejari- 



ONYCHIUM. 



Description. A small genus of Ferns (ord . Filices). 

 They are closely related to Pteris, but have much 

 more finely cut fronds. Auratum and japonicum 

 are the only species that are common in cultiva- 

 tion, and these are grown as much for their beauty 

 as pot or pan plants as for the value of the fronds 

 for cutting. The fronds make pretty screens and 

 albums when dried. 



Propagation, By spores. Sporelings of anratum 

 want careful management or they quickly damp 

 off. Japonicum may be increased easily by 

 division of the numerous crowns ; auratuni makes 

 but a single crown. 



Soil. Fibrous loam, peat or leaf mould, and 

 sand, in equal parts, with a few pieces of charcoal. 



OnyfMvm (of Blume, see Dendrolimm). 



