lochroma 



( 444 ) 



Ipomoea 



divided with a sharp spade. The divisions require 

 no coddling, but may be planted straight away in 

 their permanent quarters. Seeds also germinate 

 readily. Any ordinary garden soil will suit, but 

 the best heads are produced in rich, well-nourished 

 ground. Mulchings of rotten yard manure, and 

 occasional soakings with clear water and liquid 

 manure, are helpful in the summer. 



Principal Species : 

 ensifolia, 9", Aug., Sep., Hookeri, .1' to '2', Sep., 



yel. pale yel., slightly fra- 



glandulosa, 2', Jy., Aug., grant, 21" to 3.J "across; 



yel. (seep. 443). the best, 



grandiflora, 2', Jy., Aug., Oeulus-Christi, 1J' to 2', 



yel. sum., yel., 3i" across. 



Helenium, 3' to 4', sum., salicina,2', Jy.fAug., yel. 



yel. Elecampane. squarrosa, 1', Aug., yel. 



hirta, iy, Jy., Aug., yel. (/. Bubonium). 



IOCHROMA (syn. CH.ENESTHES). 



Greenhouse trees and shrubs (ord. Solanacese), 

 rarely cultivated except in botanic establishments. 

 Do well under the same treatment as the florists' 

 Chrysanthemum". 



Principal Species : 

 fuchsioides, 4', Aug., Sep., grandiflorum, 4', Aug., 



or., sc. Sep. 



tulmlosuin, 4', Aug., 

 Sep., pur. 



IONIDIUM. 



Herbs and sub-shrubs (ord. Violarieas) of little 

 decorative merit, and seldom seen in cultivation. 

 From the roots of the species Ipecacuanha is 

 obtained the white ipecacuanha of commerce. 



IONOPSIDIUM. 



A small genus two species only of annuals 

 (ord. Cruciferse). Acaule, the species generally 

 cultivated, is a charming little plant only a few 

 inches in height. Seeds should be sown out of 

 doors in spring (April). As a rule, it is only ne- 

 cessary to sow once, seedlings from self-sown seed 

 coming up each year afterwards in abundance. 

 A rather shady situation is the most suitable, and 

 almost any soil will do provided it be not very hot, 

 dry, and sandy. The genus is now referred to 

 Cochlearia by some botanists, but is kept distinct 

 here for cultural purposes. 



Principal Species : 



acaule, 2" to 3", sum., lil. (Cochlearia acaulis 

 of some). 



IONOPSIS. 



Epiphytic Orchids (ord. Orchidaceas), requiring 

 a stove temperature. The plants are exceedingly 

 pretty, and arc favourites in many quarters, 

 although one species only is generally "met with 

 paniculata. The plants are rather difficult to do 

 well, and pieces have to be continually imported, 

 not only to increase but, to keep up the stock. The 

 plants do best if fixed to a block of wood, a little 

 live sphagnum and fibrous peat being worked in 

 between the roots, and hung up close to the glass. 

 Plenty of water is required at all times to keep 

 them healthy. 



Principal Species : 



paniculata, 6", wh. or tenera (see utriculari- 

 ro., flowers at various oides). 



seasons. utricularioides, wh., pk. 



spotted lip (syn. tenera). 



Involucraria (see Triehnmanes). 

 lone (see Bulbop/iyUum). 



IOSTEPHANE. 



Two species of hairy herbs (orcl. Composite) from 

 Mexico. Division of the roots in spring is an easy 

 method of increase. Se^ls, also sown in spring, 

 soon germinate, and make good plants. Any 

 ordinary garden soil will do. Although practically 

 hardy, heterophylla should receive a little protec- 

 tion in severe winters. Long, damp, cold spells are 

 injurious to it. 



Principal , Species : 



heterophylla, H', aut.. hdy., lil. 



IPOMCEA. 



Description. A large genus (ord. Convolvula- 

 cete) of plants of very varied habit. Some are 

 hardy, others need a greenhouse or stove; some 

 are annuals, others perennials ; and herbs, shrubs, 

 and climbers are all included. In most cases the 

 flowers are large and showy, some very brilliant 

 shades of blue being included. The limits of the 

 genus have been considerably altered of late years, 

 several plants being referred to it that were at one 

 time placed in other genera. Thus the popular 

 Convolvulus major is correctly Ipomoea purpurea ; 

 and Mina lobata is correctly I. versicolor. Of the 

 economic products of the genus, jalap, from Purga, 

 is the chief. The seeds of hederacea furnish a 

 medicinal resin. 



Propagation. By seed for the annuals. All the 

 stove evergreen perennials can be increased by 

 cuttings of the side shoots, rooted in sand and 

 peat in brisk bottom heat. Horsfallise, however, 

 which is probably the best of the stove winter- 

 flowering climbers, does best from layers, although 

 cuttings may be rooted. Versicolor, or Mina lobata. 

 as it is popularly called, does well if seed be sown 

 out of doors, in a warm corner, at the beginning 

 of April. It loves to ramble over old Pea sticks, 

 or stumps of trees from which the branches have 

 not been removed. 



Soil. Any fairly rich garden foil will do for the 

 hardy and half-hardy species and varieties. For 

 pot culture use fibrous loam, leaf soil, and old 

 Mushroom bed manure, in equal parts, with sand. 



Other Cultural Points. The stove climbers need 

 to be pruned when flowering is over. They should 

 not be strained tightly to the roof, as the best 

 effects are obtained when the flowering sprays are 

 allowed to hang. Purpnrea does only moderately 

 well against a wall, as it is generally attacked by 

 red spider. It likes a wooden trellis, or a circle 

 of Pea sticks to clamber over, and then it keeps 

 its foliage and flowers freely. It is a fairly good 

 town plant. 



Principal Species and Varieties : 



[NOTE. All are perennials except where othcr- 

 w.ise stated.] 



Bona-Nox, 10', Jy., Aug., Horsfallite, win., St., ev. 



st., cl., wh. el., ro. 



grandiflora, large, frag- Briggsii. 



rant. Learii, Jy., Oct., st., ev. 



bonariensis, sum., st., el., cl., bl. (//. Pharbitis 



pur., lil., roots tuberous. Learii of Botanical 



hederacea, 10', Jy. , Sep., Magazine 3928). 



hlf-hdy. per., petals bl. pandurata, Je., hdy. per., 



(ti/ns. Nil and Convol- cl,, wh., pur. throat, 



vulus Nil of liotntrical Purga, aut., st., ev. cl., 



Magazine 188). Many pur..ro.(si/.Exogonium 



garden vars. ; atrovio- Purga of Botanical 



lacea (vio., wh.), gran- Register xxxiii., 49). 



diflora (bl.), and Huneri Jalap, 



variegata (variegated purpurea, 10', Je., Sep., 



foliage), are the best. hdy. nun., dark pur. 



