AN ENCYCLOPADIA 
469 
OF HORTICULTURE. 
DICLINOUS. Having stamens in one flower, and 
pistils in another. 
DICLIPTERA (from diklis, double-doored, and pteron, 
a wing; referring to the two-celled winged capsule or seed- 
vessel. ORD. Acanthacee. 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. Tweediana (Tweedie's) Л. orange-red, numerous, tubular. 
Autumn. Z. opposite, oblong-obtus Monte Video, 1874. A 
Mcd ny greenhouse perennial, with numerous stems, (R. H. 
DICLYTRA. See Dicentra. 
Dictamnus—continued. 
Rutacee. А strong-smelling herb. Flowers white or 
rosy, showy. Leaves alternate, impari-pinnate, exstipu- 
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 by 
seed, which should be sown when secured. 
D. albus (white)* Fraxinella. jl., racemes long, terminal. 
June. J. pinnate; leaflets four to five pairs, cordate at the base, 
acute at the apex, finely serrulated. h. lft. to lift. South 
Europe, 1596. The whole [== 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. SYN. 
May 
FiG. 660. DIEFFENBACHIA AM(ENA (see page 472). 
DICOTYLEDONOUS. Having two cotyledons. 
DICOTYLEDONS. This name is now more generally 
used than Exogens. 1% is one of the two classes into 
which Pheenogamous or flowering plants are divided. The 
distinguishing characteristics may be briefly stated: 
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 of 
wood, added to the outside of the old wood, and another 
‚ €f bark added to the inside of the old bark. 
DICTAMNUS (from Diktamnos, the old Greek name 
"sed by Hippocrates).  Dittany, or Fraxinella. ORD. 
| 
D. Frazine T There are varieties with 
white, and ai ж pea pal a Sev. ae 
D. Fraxinella (Fraxinella). A synonym of е pe Ea 
DICTYANTHUS (from diktyon, network, and anthos, 
a flower; alluding to the markings on the corolla). Syys. 
Rytidoloma, Tympananthe. | ORD. Asclepiadee. Pretty 
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. 
y corolla whitish, spotted, el y 
D. Pavonii (Pavon's. jl, corolla p ri n 
veined, September. 4. opposite, cordate. A. 101. 1854. 
4152.) 
DICTYMIA. See Polypodium. ——— 
