AN ENCYCLOPAEDIA OF HORTICULTURE. 



469 



DICLINOUS. Having stamens in one flower, and 

 pistils in another. 



DICLIPTERA (from dilclis, double-doored, and ptenn, 

 a wing ; referring to the two-celled winged capsule- or seed- 

 vessel). OBD. Acanthaceat. A genus of stove or green- 

 house annuals, perennials, and evergreen herbs, rarely, if 

 ever, seen in cultivation outside botanic gardens. There 

 are about fifty species. For culture, see Justicia. 

 D. Tweedlana (Tweedie's). JL orange-red, numerous, tabular. 



Autumn. I. opposite, oblong-obtuse. Monte Video. 1874. A 



very showy greenhouse perennial, with numerous atoms. (B. H. 



DICLYTRA. See Dicentra. 



Dictamnns continued. 



Rutacece. A strong-smelling herb. Flowers white or 

 rosy, showy. Leaves alternate, impari-pinnate, exstipn- 

 late, with four to six pairs of serrulate leaflets, full of 

 pellucid dots. Stems glandular at the apex. It is of 

 easy culture in ordinary garden soil, preferring, however, 

 a rather dry position. Propagated by divisions; or bj 

 seed, which should be sown when secured. 



D. ultras (white).* Fraxinella. JL, racemes long, terminal. May 

 June. I. pinnate ; leaflets four to five pairs, cordate at the ba-ne, 

 acute at the apex, finely serrulated h. 1ft to lift. South 

 Europe, 1596. The whole plant, especially when gently rubbed, 

 emits an odour like that of lemon-peel ; but when bruised, it has 

 something of a balsamic scent, Eastern Europe, Asia. Srs. 



Fie. 660. DIBFFBNBACHIA AMCE!A (see page 



DICOTYLEDONOUS. Having two cotyledons. 



DICOTYLEDONS. This name is now more generally 

 used than Exogens. It is one of the two classes into 

 which Phamogamous or flowering plants are divided. 1 

 distinguishing characteristics may be briefly etat^'- 

 Flowers with the organs mostly in fours or fives. Embryo 

 with opposite cotyledons. Leaves usually with netted 

 veins. Stem with bark, pith, and interposed wood ; when 

 perennial, increasing annually in diameter by a layer c 

 wood, added to the outside of the old wood, and another 

 of bark added to the inside of the old bark. 



DICTAMNUS (from Diktamnos, the old Greek name 

 used by Hippocrates). Dittany, OP Fraxinella. OBD. 



There are varieties with 



D. FraarineOa. See Fig. 659, page 468. 



white, and also with pale purple, flow. 

 D. Fraxinella (Fraxinella). A synonym of D. . 



DICTYANTHUS (from diktyon, network, and anthot, 

 a flower ; alluding to the markings on the corolla). SYNS. 

 Rytidoloma, Tympananthe. OBD. Asclepiadece. 

 stove climbers. Besides the one described below, there 

 are three other species not yet introduced to cultivation. 

 All are natives of Mexico. For culture, see Passiflora. 



D. Pavonil (Pavon's). ft,, coroUa whitish, 

 veined. September. 1. opposite, cordate. A. I 

 4750.) 



1854. 



DICTYMIA. See Polypoditun. 

 DICTYOOK.AMMA. See Gymnogramme. 



