AN ENCYCLOPEDIA OF HORTICULTURE. 



479 



(Enothera continued. 



<E. taraxacifolia (Dandelion-leaved).*/, white, becoming red- 

 dish as they fade, with large, obovate, entire petals, and a very 

 long tube. Summer. I. pubescent, alternate, interruptedly pin- 

 natifld, sinuately toothed, but the apex entire. Stem branched, 

 elongated, procumbent, h. 6in. Chili, 1825. (S. B. F. G. 294.) 



<E. tenella (delicate), ft. purple. June. I. linear-spathulate. 

 Stem branched, erect, h. 6in. to 9in. Chili, 1823. Plant rather 

 glaucous. Annual. (B. M. 2424.) G. tenuifolia is very closely 

 allied to this species. 



(E. triloba (three-lobed). ft. pale yellow, very fragrant in 

 the evening ; petals obovate, slightly three-lobed at the apex, 

 the middle lobe mucronate. May to September. I. interruptedly 

 pinnatifld, toothed, h. Sin. to 6in. North America, 1822. Annual. 

 (B. M. 2566.) 



<E. vinosa (wine-stained), fl., petals nearly white, with a slight 

 dash of purple ; calyx tube not more than one-third the length 

 of the limb. July and August. I. linear-oblong, sub-dentate, 

 glabrous, h. 2ft. California, 1835. Hardy annual. (B. R. 1880, 

 under name of Godetia vinosa.) 



<E. Whitney! (Whitney's).* fl. very numerous, crowded, Sin. to 

 4in. in diameter, rosy-red, blotched with crimson. Summer. 

 I. oblong-lanceolate. h. 1ft. to Hft. California, 1870. Annual. 

 SYN. Godetia yrandiflora (B. B. 28, 61). (B. M. 5867.) There are 

 several varieties of this fine species, including concolor (white), 

 tlammea (crimson), and flammea striata (crimson-striped). 



Varieties. Of hardy annuals, few are more beautiful than 

 than some of the garden varieties of (Enothera, which are 

 much better known under the familiar name of Godetia. 

 They are very attractive in mixed borders, especially if 

 sown in masses, and are also most effective when grown 

 in pots for greenhouse decoration. The following are 

 amongst the best in cultivation : 



Duchess of Albany, fl. of a beautiful satiny-white, sometimes 

 4in. across. Plant of pyramidal growth, very floriferous, and 

 extra good. 



FIG. 725. FLOWERING BRANCHES OF (ENOTHERA LADY 

 ALBEMARLE. 



Lady Albemarle. fl. crimson, showy, and distinct. Plant dwarf 



and branching ; very beautiful See Fig. 725. 

 Lady Satin Rose. fl. beautiful rose. Habit similar to LADY 



ALBEMARLE. A brilliant-coloured and good variety. 

 Princess of Wales, fl. ruby-crimson. A good, rather old, 



variety, rather taller growing than either of the preceding. 

 The Bride, fl. white and carmine. Very free flowering and pretty. 



(ENOTHEK2C. A synonym of Onagrarice. 



OFFICINAL. Sold in shops. 



OFFSETS. An Offset is a short, lateral shoot, bear- 

 ing clustered leaves at the extremity, and capable of 

 taking root when separated from the parent plant. The 

 order Crassulacece affords several examples. 



OFTIA (meaning unexplained by its author). SYN. 

 Spielmannia. OED. Myoporinece. A genus comprising 

 only a couple of species of greenhouse, evergreen shrubs, 

 natives of South Africa. Flowers white, in the upper 

 axils, sessile, or shortly pedicellate, ebracteate ; calyx 

 five-parted ; corolla tube cylindrical ; limb of five obovate, 

 spreading lobes. Leaves alternate, or the lower ones 

 opposite or almost whorled, sessile, serrulate, often 

 rather small. The undermentioned species will thrive 

 in any rich light soil. Young plants may be readily 

 obtained by means of cuttings, inserted in sand, under 

 a glass, in heat. 



O. aflicana (African), fl. white, solitary, axillary; corolla 

 salver-shaped, the segments marked with a blue streak at 

 their base. February to November. I. ovate, acute, rigid, 

 unequally serrate, with slightly pungent teeth ; lower ones 

 opposite ; upper ones alternate. Branches succulent, opposite, 



rounded, h. 3ft. 1710. 

 mannia qfricana.) 



(B. M. 1899, under name of Spiel- 



OGECHEE LIME. See Nyssa capitata. 



OHIGGINSIA. A synonym of Hoffmannia 



(which see). 



OHLENDORFFIA (named in honour of Dr. C. F. 

 Ohlendorff, of Holstein). SYN. Chilostigma. OED. Scrophu- 

 larinece. A genus comprising nine species of small green- 

 house shrubs, rarely herbs, depressed, prostrate or tufted, 

 now regarded as a synonym of Aptosimum ; one is a 

 native of Nubia, and the rest are found in tropical 

 Africa. Flowers sessile, axillary, bibracteolate ; calyx 

 deeply five-cleft, with narrow, sub-valvate lobes ; corolla 

 usually bluish, venose, with an enlarged throat, and a 

 spreading, oblique, five-cleft limb ; stamens four. Leaves 

 alternate, clustered, entire, one-nerved, oblong-spathn- 

 late, linear, or acicular. 0. procumbens, the only species 

 known to cultivation, thrives in well-drained sandy peat. 

 It is propagated by cuttings of half-ripened shoots, 

 inserted in gentle heat; or by seeds. 



O. procumbens (procumbent), fl. blue ; corolla eight lines long, 

 pubescent without, with a short narrow tube and a funnel-shaped 

 limb. August. I. three to four lines long, not opposite, much 

 crowded, petiolate, obovate, glabrous, rather thick, very obtuse, 

 shortly mucronate. h. 2ift. South Africa, 1836. Undersnrub. 

 (B. R. 1882, under name of Aptosimum depressum.) 



OIDES. See Odes. 



OIDIUM. A name given to many of the minute 

 Fungi included under the name Mildew, at a time 

 when they were regarded as distinct and good species, 

 without regard to the forms which, it is now known, 

 they assume when fully mature. See Mildew. In the 

 Oidium stage, the Fungus consists of a white coating 

 over all parts of the infested plants. Under the 

 microscope, this is seen to consist of a tangled network 

 of nearly transparent filaments, made up of cells joined 

 end to end. Most of the filaments creep on the surface 

 of leaves, or stems, of the host-plants, pushing fine-lobed 

 branches into the cells of the latter, to suck food from 

 them ; while erect filaments stand up over the surface 

 of the Fungus. Each filament is made up of a row of 

 cells, and those at its tip, after a time, break off, and 

 fall away from the lower part, as reproductive bodies 

 (conidia) ; these in some Fungi are globular, in others 

 barrel-shaped, or nearly cylindrical. But many of the 

 Fungi formerly placed in the group called Oidium, when 

 traced to their full development, are found to form re- 

 productive bodies (spores) in asci, which are inclosed 

 in a case, or perithecium, formed of brown cells, closely 

 joined side by side. Frequently, many perithecia are 

 formed on a patch of the Fungus resembling grains of 



