48 



ALNUS 



S. Eu. Var. imperiilis, Desf. Fig. C6. Lvs. deeply pin- 

 nately lobed with lanceolate or nearly linear lobes. Var. 

 inclsa, Willd.(var. oxyacanthifdlia, Spach.). Lvs. small, 

 deeply incised, like those of CraUegus oxyacantha . Var. 

 lacini&ta, Willd. Lvs. pinnately lobed ; lobes oblong. 



Alnus elutinosa. 



Var. rubrinfirva, Dipp. Lvi. large and shining, with red 

 nerves and petioles ; pyramidal tree of vigorous growth, 

 very handsome. 



A.acumiMta.'HBK. Tree: lvs. usually ovate and pubescent 

 beneath, doubly serrate. C. Amer., north to Ariz.— A. Aino&e<- 

 ula, Hort,— A. viridis.-A. barhAla, C. A. Mey. Allied to A. 

 glutinosa. Lvs. pubescent on the veins I, eneatli, ovate. Cauca- 

 sus. Perhaps hybri<l .>l A ^! inr.^^.i -nl ilata.— A. Cana- 



d^)Wi«, Hort.=A.ni^'i , i l \ Sjlutinosa.— 



A.cordi/Mia.lm.' \ i . ( - Oi—A. viridis. 



— A. ftr7refi, Hort.= A .i.,i ,. > i A •t:\~A.alafiea, 



not Regel.=A. ghil -i ;,r 1 ,„.i,-ro- 



nbeordata.— A. obi"!:;!"'' 'A : \ \ ^-luti- 

 t;i.—A.oblongAta,'R<i^., \ u;,, i ii i:ii.i — .1. 

 Tree, 20-30 ft.: Iv.s. ..1,1^,,;; n^ ;,t, , .■une;,te, 

 in. long: strobiles y>-l in. long, pedunclcd. 

 S.S. 9: 457.— A. Oregana, Nutt.=A. rubra.— 

 ,ne=A.subcordata.-A.p«;»\'ir«is, Tsch. (A. 



■ ■ ■ Alfked Reiider. 



ALOCASIA (name made from Colocasia). Aroldew. 

 Stove foliage plants, of 30 or more original species, 

 from trop. Asia and the Malayan Isls. Closely allied to 

 Caladium and particularly to Colocasia, which see. 

 These three genera differ chiefly in characters of fruit. 

 Monogr. by Eugler in DeCandolle's Monographise Pha- 

 nerogamarum, Vol. 2. In 1890, 52 species and speciflc- 



ALOCASIA 



allv named hybrids were in cult. (Bergman, Jour. Soc. 

 Na"t. How. France. I.H. 37: SO). 



Alocasias are propagated by suckers or cuttings of 

 the rhizomes, placed in small pots containing a mixture 

 of light, fibrous peat and s:ind in equal proportions, and 

 pluni.n(l in ;i el.ixi- tr:uri.- mi- propagating box with bot- 

 tom h. ai. 'I'll. , run;, al- i l.i ^-rown from seeds sown in 

 4-inoli |i>.i-. Ill o lialii. I" aiy soil in a temperature of 

 75° l'\ Tlio iiiMiiiIi <-i' .Mari-li is the best time for propa- 

 gating. The evergreen species (as A.cuprea,longiloba, 

 Lowii, Begina) thrive best in a compost of two parts 

 fibrous peat and sphagnum moss and one part lumps of 

 fibrous loam, to which should be added a sprinkling of 

 silver sand and a few nodules of charcoal to keep the 

 whole sweet. The herbaceous species (as ^. mncrorAizo) 

 do best in good fibrous loam to which ^3 of well-rotted 

 cow-manure orpulverized sheep-manure has been added. 

 Perfect drainage of the pots is absolutely necessary, 

 and in potting, the evergreen species should be coned 

 up two or three inches above the rim of the pot, and 

 finished off with a surfacing of live sphagnum moss. 

 The season of active growth commences about the first 

 of March, when they should be given a temperature of 

 70° at night, with a rise of 15° by day, and the atmos- 

 phere must be kept in a humid condition. They should 

 be given a position free from draughts and direct sun- 

 light. They require an ahnniinnee of -nat. r at the roots 

 as the leaves develop, anil an- L'r'-;irly lioiaiitotl li\- an 

 occasional watering of el- ai- I i- pi a I -lo-. i- or .■-.w-nianiiro 

 water. To obtain tho I- -i il- % - I- .pni. nt ..i ilo- I, a-..-,. 

 heavy syringing .should l-o a\oiil .1, but Iroquoiit .-[iray- 

 ing on all fine days with an atomizer sprayer is very 

 beneficial. Towards winter the humidity of the atmos- 

 phere and the supply of water to the roots should be 

 reduced with the evergreen species, and gradually with- 

 held altogether as the leaves mature with the herba- 

 ceous species. The temperature during winter should 

 not fall below 60°. Cult, by E. J. Canning. 



The propagation of most of the Alocasias consists of 

 cutting up the stems, so that each piece will have at 

 least one dormant bud. The pieces should be placed 

 amongst moss, in a hot propagating frame, where they 

 vegetate quickly. Such kinds as A. Sanderiana , A. 

 macrorhisa,va.T.varie{iiil,i.:,]ii\ A.Jmningsii (Colocasia) 

 have creeping rhizoiiu-s. ai tin- nids of which small 

 resting tubers are fonm .1. 'I'll, v,. should be carefully 

 collected, and the two lirst iiaim-il started in a propa- 

 gating frame in a pan ot uioss and sand. A. Jenningsii 

 roots readily in ordinary soil. Most of the kinds require 

 a soil which is very fibrous, with a little moss added. The 

 pots should be half filled with potsherds as drainage. 

 Cult, by G. W. OLn-ER. 



A. I/vs. distinctly notched or undulate on the margin. 

 princeps, Nicholson. Lvs. sagittate, the basal lobes 



narrow and spreading, the margins deep-sinuate; upper 

 surface olive-gro.-n. witli darker veins, the under lighter 

 colored, witli to-own veins and margin; petioles brown- 

 spotted, slender. I-;. Iii.l. 



Sanderi4na, Hnll. Fii:. 07. Lvs. long-sagittate, with 

 deeply notched margin, the basal lobes wide-spreading; 

 deep glossy green with metallic refiection, with promi- 

 nent white margins and veins; petioles brownish and 

 striped. Philippines. Ong. 1897: 84.— One of the best of 

 recent introductions. Runs into various forms, and has 

 entered largely into cultivated hybrids. 



AA. Lvs. plane and entire on the margin. 



B. Markings chiefly on the petioles, the blades green. 

 zebrlna, Koch & Veitch. Lvs. triangular-sagittate ; 



|.etiolcs beautifully marked with large zigzag bands of 

 f,'n-en. Philippines. P.S. 15:1541-2. 



Villeneiivei, Lind. & Rod. Lvs. sagittate-ovate, the 

 veins of lighter green and prominent, basal lobes very 

 unequal; petioles spotted with chocolate -brown. Large. 

 Borneo. LH.34:21.— Named for deViUeneuve, Brazilian 

 ambassador to Belgium. 



BB. Markings or coloration chiefly on the leaf-blades, 

 c. Veins and midrib light yellow. 



Lindeni, Rod. Lvs. cordate-ovate, long-pointed, 8-12 

 in. long, bright green, with yellowish veins curving off 



