Icacina 



( 438 ) 



Ichnocarpus 



may also be sown at the beginning of August, to 

 stand the winter in the open, and bloom during 

 April and May. The other species may be 

 increased by seeds, but the evergreens are mostly 

 propagated from cuttings in sandy soil, almost any 

 time after flowering, and placed under a hand-liglit 

 or cold Irame with a northern aspect during the 

 summer months. Give shade during the day. 



Soil. The hardy species will thrive in any 

 friable garden soil that is well drained. Gib- 

 raltarica should be potted in fibrous loam, with a 

 third of leaf soil and plenty of sand to keep it 

 porous. 



Other Cultural Points. Annuals like amara, and 

 umbellata arid its varieties, are suitable subjects for 

 beds or masses in themixed border, sowing in August, 

 and again in March and April for a succession. 

 Saxatilis and semperflorens flower very early if the 

 weather is favourable, and they, as" well as sernper- 

 virens, tenoreana, and Pruiti, are most at home on 

 the rockery, where they are kept relatively dry in 

 winter, and make a fine display drooping over the 

 ledges, semp rvirens, its superb variety garrexiana, 

 and corifolia being well adapted for this purpose. 

 The last named is the latest and best flowering 

 evergreen species. Sempervirens, semperflorens, 

 and corifolia are the best for the herbaceous 

 border. Gibraltarica should be grown in a cool 

 greenhouse or sheltered spot. 



Principal Species and Varieties : 



amara, 6" to 12", Je., Climax, 

 ann., wh. ; many good Little Gem. 

 garden vars. Common 

 Candytuft. 



spiralis. 



corifolia, 3" to 6", Je., 



hdy. ev. , wh. 

 gibraltarica, l',My. , grh., 



wh., pk. 

 saxatilis, 6", Mch. to My., 



hdy. ev., wh. 

 semperflorens, 1' to H', 



Mch. to My., hdy. ev., 



wh. 

 senvoervirens, 9" to 12", 



My., hdy. ev., wh. 



garrexiana, flowers 

 much larger (nee figure). 



Other Species : 



ciliata, 9", Je., Men., wh. 

 gibraltarica hybrida, wh., 



ro. pur. 



intermedia, 1', Je.,bien. 

 lagascaua, 1', Je., ann. 

 nana, 4", Je., aim., pur. 

 odorata, 1', Je., ann. 

 pectinate, 1', Je., wh. 



Perfection. 



superba (see p. 437). 

 tenoreana, 6" to 12", Je., 



hdy., pale pur. 



petoea, wh. , tinged 

 red, pretty for rock- 

 work. 



mnbellata, 1', Je., Jy., 



hdy. ann. , pur. 

 atropurpurea, dark 



pur. 



carnea, flesh. 



nana p.urpurea, dwarf 

 pur. 



purpurea lilacina, lil. 

 pur. 



Pruiti, 6"to9", My.,wh. 

 pubescens. 6", Je., pale 



vio. 

 pumila (now Thlaspi pu- 



milum). 



stylosa (see Noccsea). 

 violacea, 3" to 4", Je., 



pur. 



ICACINA. 



A small genus of stove shrubs (prd. Olacinese), 

 of which only one species, namely Mannii, seems 

 to have been introduced. It has a large, tuberous 

 root, slender, climbing stems, and small, pale yellow 

 flowers in dense, axillary clusters. Propagation, 

 by cuttings in sandy loam in a propagating case, 

 with bottom heat. Soil, fibrous loam, leaf mould, 

 and a fair proportion of sand. It flowers in 

 October. 



ICHNEUMON FLIES. 



This name is applied to a large section of insects 

 (IchneurnonideEc) the larva? of which are, in many 

 instances, parasitic in the bodies of oilier insects. 

 The ichneumons have four wings and long, slender 

 bodies, the abdomen of which is connected with 

 the rest by a slender, stalk-like joint as a rule,, 

 from which they may be 'recognised. As the 

 ichneumons are destructive to the enemies of the 

 gardener, they should be encouraged. Aphides re- 

 cognise their enemy, and become greatly agitated, 

 but the female ichneumons manage ultimately to 

 pierce the green fly and deposit an egg in its 

 body. Large numbers of aphides, dead, pale 

 brown, sticking to leaves, with a small hole in the 



Ibidium (see Spiranthes). 

 Icaeo (see Chrysolialanui). 

 Jcacorea (see Ardisia). 

 Icaranda (see Jacaranda). 



Photo: Cassell <fc Company, Ltd. 



IBEKIS SEMPERVIRENS GAUREXIANA. 



inflated shell, may be found, indicating that the 

 larva of the ichneumon lias become fully fed in 

 its victim and escaped. Most or all insects have 

 their particular enemy belonging to this order of 

 flies. Microgaster glomeratus, the parasite of the 

 Large White Cabbage Butterfly, lays a large 

 number of eggs in the body of the caterpillar, and 

 when the latter should be about fully grown it 

 sickens if it has been victimised, and instead of 

 changing to a pupa, dies as a large cluster of yellow 

 cocoons of the ichneumon are seen to emerge from 

 its side. 



ICHNOCARPUS (syn. ARANOSMA). 



A genus of stove twiners (or/I. Apocynacese). 

 Propagation, by short lateral shoots in sand placed 

 under a bell-glass in stove heat during the early 

 part of the season. Soil, loam, peat, and sand. 



Ice Plant (see Mesembryantliemum). 

 Idea (see Bursera). 

 Ictodes (see Symplocarpus). 



