DOTI 



[ 304] 



DOU 



D Hatufti'ni (Houston's). . June. S. Amer. 

 1/47. 



tultici'na (trumpet). June. Trinidad. 1817- 



DORYA'NTHES. (From dory, a spear, 

 and a/jf/ios, a flower; the flower-stem 

 shoots up from twelve to twenty feet high, 

 like the handle of a spear, bearing flowers 

 on the top. Nat. ord., Amaryttid* [Ama- 

 ryllidacea^]. Linn., ft-Hexandria l-Mono~ 

 yynia. Allied to the American Aloe, but 

 not with succulent leaves.) 



Tids gigantic half-lily and half-palm looking 

 plant, with its bundled fleshy roots, seems rather 

 out of place among Ainaryllids. This, with its 

 fellows, Littsea and Fourcroya, can only tintl head- 

 room ia the loftiest conservatories. Greenhouse 

 evergreen. Suckers and seeds at times ; pear and 

 rich loam. Summer temp., 6*) to 80; winter, 

 45 to 60. 



D. efue'ha (lofty). 20. Cream. July. N. S. 

 Wales. 1800. 



DORY'CKIUM. (From dory, a spear; 

 adopted from Pliny, who applied the 

 name to "a poisonous herb wherewith 

 they poisoned arrow-heads, darts, &c." 

 Nat. ord., Leguminous Plants [Fabacese], 

 Linn., Yi-Diaddphia-Decandria. Allied 

 to Lotus and Trifoiium.) 



Seeds in March ; herbaceous ones also by divi- 

 sioa ; common garden-soil. 



HARDY HERBACEOUS. 



D. herbu'ceum (herbaceous). 14. White. July. 

 South Europe. 1802. 



intermedium (intermediate). White. June. 



Caucasus. 1838. 



tatifo'tium (broad-leaved). 1$. White. July. 



Iberia. 1818. 



HARDY EVERGREEN. 



D. hirsu'tum (hairy). 3. lied, white. July. 

 South Europe. 1683. 



re'cium (upright). 2. Red. July. South 



Europe. 1(540. 



sufrutieo'sum (sub-shrubby). lj. White. 



July. South Europe. 1640. Halt-hardy. 



tomento'sum (woolly). 3. Red, white. July. 



South Europe. 1817. 



DORYO'PTERIS. (From dory, a spear, 

 and pteris, a fern ; spear-leaved Fern 

 [Polypodiacese]. Linn., 2-Cryptoyamia 

 1 -Filices. Alii ed to P teiis. ) 



Stove herbaceous Ferns, with yellowish-brown 

 spores. Division, chiefly in spring; peat and 

 loam. Summer temp., 60 to 80; winter, 45 

 to 55. 

 D. colli'na (hill). August. Brazil. 



cordifit'lia (heart-leaved). 



husta'ta (halbert-teuwed). June. W. Ind. 1823. 



pulma'ta (hand-shaped). J. July. Caraccas. 



1821. 



sagittifn'lia (arrow-head-leaved), i. July. 



Waiti 1 chit (W allieh's). E. Ind. 



DOUBLE FLOWERS. Hybridizing, aided 

 by cultivation, gives birth to these objects 

 of the gardener's care. To the uniniti- 

 htud it seems incredible that the double 



moss rose should be a legitimate descend- 

 ant from the briar ; neither do the flowers 

 of the Fair Maid of France appear less 

 impossible derivatives from those of the 

 JRariu'nculiis platan if u'lius ; nor bachelor's 

 buttons from the common butter-cup; yet 

 so they are. Double flowers, as they are 

 properly called, are more correctly dis- 

 criminated as the full flower, the multi- 

 piieate flower, and the proliferous flower. 



The full flower is a flower with its 

 petals augmented in number by the total 

 transformation into them of its stamens 

 and its pistils. Orte-petaled flowers 

 rarely iindergo this metamorphosis, but it 

 is very common in those having many 

 petals, as in the carnation, ranunculus, 

 rose, and poppy. But this is not the only 

 mode in which a flower becomes full, for 

 in the columbine (Aquile'yia) itis effected 

 in three different ways, viz., by the mul- 

 tiplication of petals to the exclusion of 

 the nectaries; by the multiplication oi 

 the nectaries to the exclusion of the 

 petals; and by the multiplication of the 

 nectaries whilst the usual petals remain. 

 Radiated flowers, such as the sunflower, 

 dahlia, anthemis, and others, become 

 full by the multiplication of the florets of 

 their rays to the exclusion of the florets 

 of their disk. On the contrary, various 

 species of the daisy, matricaria, &e., be- 

 come full by the multiplication of thy 

 florets of the disk. 



The muliiplicate flower has its petals 

 increased by the conversion of a portion 

 of its stamens, or of its calyx. It occurs 

 most frequently in polypetalous flowers. 

 Linneeus gives the only instances we know 

 of the conversion of the calyx into petals, 

 and these are to be observed in the pin'!; 

 (Dia'iithus car yophy' Hits), and a few ol 

 the alpine grasses. 



A proliferous flower has another flowvr 

 or a shoot produced from it, as in the 

 variety of the daisy popularly known r.s 

 the Hen-and-chickens. It occurs al-u 

 more rarely in the ranunculus, pink, 

 marigold, and kawkweed. A leafy shoot 

 often appears in the bosom of the double- 

 blossomed cherry, anemone, and rose. 



A due supply of moisture, but rather 

 less than the plant most delights in, 

 when the production of seed is the de- 

 sired object, a superabundant supply of 

 decomposing organic matter to its roots, 

 and an exposure to the greatest possible 

 degree of sun-light, are the means suc- 

 cessfully employed to promote excessive 



