OAK. See Quercus. 

 Oats Animated. See Avena. 



Obeliscaria. [Composite.] Showy hard}^ perennials. 

 They require the same treatment as Riidbeckia, to whici> 

 they are alHed. 



O. cohimnaris (cokimnar) ; hardy perennial ; 3 feet ; fiowers 

 jellow, in August; North America 3 18 11. O. Drdr-wiondii 

 (Drummond's) ; hardy perennial ; 3 feet ; flowers yellow and 

 black, in July; North America; 1836. O. pidcherrivia (pret- 

 tiest) ; hardy perennial ; 3 feet ; fiowers yellow and red, in Au- 

 gust ; Texas ; 1835. 



CEnothera. Evening Primrose. [Onagraceae.] Showy 

 hardy plants, mostly perennials and biennials, v/ith a few 

 annuals. The annuals require to be sown in May, where 

 they are to flower, and to be thinned when they come up ; or 

 they may be sown in a patch, and planted out. Common 

 garden soil. The biennial i\nd percnnia; kuids should be 

 sown in patches, and planted out when they are large enough, 

 ■jvherever they are to bloom. The latter grow best in peat}' 

 '^■oil. and especially in situations where they are not subjected 

 .'J drought. There are a large number of species. Most 

 of the old-fashioned annual CEfiotheras are now called 

 Goctetia. 



CE. bie7inis (biennial) ; hardy biennial ; 4 feet ; flowers yellow, 

 in July ; North America ; 1629. (E. Di'iimmoitdii (Drum- 

 mond's) ; half-hardy perennial ; i foot ; flowers yellow, in July ; 

 Texas , i^j3. (E. ^roseri ^Fraser's) ; hardy perennial ; 18 

 18 273 



