ONI 



[060] 



ONO 



to allow the necessary cultivation. 

 They must he kept thoroughly clear 

 from weeds, and when in flower have 

 stakes driven at intervals of five or six 

 feet on each side of every two rows, to 

 which a string is to be fastened 

 throughout the whole length, a few 

 inches below the heads, to serve as a 

 support and prevent their being broken 

 down. The seeds are ripe in August, 

 which is intimated by the husks be- 

 coming brownish ; the heads must then 

 be immediately cut, otherwise the 

 receptacles will open and shed their 

 contents. Being spread on cloths in 

 the sun, they soon become perfectly 

 dry, when the seed may be rubbed out, 

 cleaned of the chaff, and, after remain- 

 ing another day or two, finally stored. 

 It is of the utmost consequence to 

 employ seed of not more than one year 

 old, otherwise not more than one in 

 fifty will vegetate. The goodness of 

 seed may be easily discovered by forcing 

 a little of it in a hotbed or warm water 

 a day before it is employed ; a small 

 white point will soon protrude if it is 

 fertile. 



ONION-FLY. See Anthomy'ia and 

 Eii'merus. 



ONI'SCUS. 0. ase'lhis, 0. armadillo. 

 Woodlice. The first is most easily dis- 

 tinguished from the second by its not 

 rolling up in a globular form when at rest. 

 They are found in old dry dunghills, 

 cucumber frames, &c., and they are in- 

 jurious to many plants, fruits, &c., by 

 gnawing off the outer skin. Gas lime 

 will expel them from their haunts, and 

 two boards or tiles kept one-eighth of 

 an inch apart form an excellent trap. 



ONOBRO'MA. (From onos, the ass, 

 and broma, food. Nat. ord., Composites 

 [Asteracese]. Linn., W-Synyencsia 1- 

 JEqualis. Allied to Carthamus.) 



Cuttings, and divisions, and seeds of peren- 

 nials ; annuals by seed ; common soil ; Arbo- 

 rcscens requires the protection of a cool green- 

 house in winter. 



0. arbore'scens (tree-like). 0. Yellow. July. 

 Spain. 1731. Evergreen. 



ceeru'lcum (blue). 1. Blue. June. Spain. 



1640. Herbaceous. 



cynaroi'des (Cynara-like). 2. White. June. 



Caucasus. 1820. Herbaceous. 

 ~~- glau'cum (milky-green). l. Purple. July. 

 Tauria. 1817. Annual, 



0. Icucoca'ulon (white-stemmed). 1. White. 

 June. Greece. 1800. Herbaceous. 



ONOBRY'CHIS. Saintfoin. (From 

 onos, the ass, and brycho, to gnaw ; fa- 

 vourite food of the ass. Nat. ord., 

 Leguminous Plants [Fabaceee], Linn., 

 17-Diadelphia ^-Decaiidria, Allied to 

 Hedysarum.) 



Best by seeds in spring, where they are to 

 remain and bloom ; as all move badly. Sandy 

 deep loam. 



HARDY ANNUAL. 



O. ca'put-ga'lli (cock's -head). l. Flesh. 

 July. France. 1731. 



HARDY HERBACEOUS. 



0. arena'ria (sand). 1. Red. July. Siberia. 

 1818. 



Carpa'tica (Carpathian). 1. Purple. July. 



Carpathia. 1818. 



confe'rta (crowded). 1. Purple. July. 



Iberia. 1817. 



cornu'ta (horned). 1. Red. July. Cau- 



casus. 1816. Evergreen. 



crina'ta (haired). Lilac. June. Levant. 



1837. 



echina'ta (hedge-hog). Flesh. June. Ca- 



labria. 1831. 



Fontanc'sii (Fontaine's). Red. July. Tu- 



nis. 1820. 



gla'bra (smooth). 1. Purple. July. Tau- 



ria. 1816. 



gra'cilis (slender). 1. Pale red, July. 



Podolia. 1820. 



Michau'xii (Michaux's). Pale red, July. 



Levant. 1820. 



monta'na (mountain), . Purple. July. 



South Europe. 1817. 



Palla'sii (Pallas's). 1. Pale yellow. Ibe- 



ria. 1820. 



pctrai'a (rock). 1. White, red. Caucasus. 



1818. 



procu'mbens (lying-down). . Purple, July, 



Iberia. 181 9. 



Ptolemai'ca (Ptolemais). 1. Yellow. Egypt. 



1816. 



radia'ta (rayed). l. Pale yellow. Iberia. 



1818. 



saxa 1 tilis (rock). 1. Lilac, yellow. South 



Europe. 1790. 



supi'na (supine). . Pale red. Switzer- 



land. 1819. 



Tanai'tica (Tanais). 1. Purple. July. 



Caucasus. 1817. 



ONOCLE'A. ( Onodcia was the Greek 

 name of a plant. Nat. ord., Ferns 

 [Polypodiacese]. Linn., Z~Cryptoyamia 

 1-Filiccs.) 



Hardy Ferns. See Ferns. 

 0. obtusilobu'ta (blunt - lobed). 1. Browu. 

 July. North America. 1812. 



scnsi'ltilis (sensitive). l. Brown. August, 



Virginia. 1/og, 



ONO'NIS. Kesth arrow. (From onos, 

 an ass, and onemi t to delight ; the ass 



