ARUM C0ST.YTU3I. 
23 
I ever have thought of looking for the minute fissure and gemmula, if they had not pro!-, 
o'uslybeen pointed out by those immortal botanists. The gemmula is fixed with its broad 
basis to the vault of its cavil y, just in the centre of the upper extremity of the embryo : its 
free apex points obliquely downwards and outwards, so as to protrude towards the fissure, 
which commences a little above the middle of the embryo and extends towards its upper 
extremity.—Ry an oversight the perfectly mature seed has been represented on the plate 
exhibiting another species, namely Arum speciosum , Tab. 20. fig. 6, 7, 8, 9, It), and 11. 
instead of Tab. Id; a circumstance, which the reader is requested to bear in mind. 
ARUM COSTATUM, Wall TAR 19 
Acaule, laeve, dioicum ; folio solitario, tern a to, foliolis semicordato-ovatis, valde acu- 
minatis, undulatis, sessilibus, subtus nervis munerosis, parallelis, elevatis, approximatissi- 
mis, anastomosantibus; scapo petioli dimidium vix aquante ; spnt/iu cylindraceo convo- 
luta, striata, intus carinata, faucein appendiculata, limbo iutegro, ovato, fornicato, acumine 
tcreti, brevi, liliformi; clavd spadicis basi subtruncatu, apicc longissima, flagelliforuii, 
descendente, spathA fere triplo longiori. 
Habitat et floret cum priore. 
Tuber magnum, orbiculatum, parum depressum, carnosum, fuscescens, comosuni fibris 
cor iosis, terctibus, eras.sis, dilute rufescentibus, subnudis. I oh uni unicum radicale, eree- 
tum, ternatuni, amplum, uti omnes planUe partes laeve, circumscriptione trilobo-cordatum, 
diamelrum sesquipedalem emetiens, sinu baseos pro fun do, lobisque fere contiguis. Pc- 
iiolus crassus,carnosus, pallide virens, striatum lineis plurimis parallelis, roseis, pallidis, 
bipedalis, basi unacum scapo, quern sulco satis profnndo, snbligulato amplest it, sesqui- 
pulliccm crassus, vaginatus, superne nndus, hinc exsculptus sulco levi, marginibus oblu- 
so, sursum attenuatus. Vagina; duae vel ties, niembranaceae, striata?, ex albo rufesceu- 
tes, alterua?; infiina brevis, adpressa, acutiuscula; reliqme luxe ainplexantes, laneeolatue, 
attenuato-acuminaUe, e recta?, sursum liberae et loiter convolutce: sum in a et iutiiua, 
longissima, scapuni excedens. Foliola sessilia, purpureo-marginata, uudulata, in acu¬ 
men liueare, fere bipodicare desiuentia, coriacea, pedalia, supra atroviridia, lucida, subtus 
priedita costA e basi ei’ussissiuni extrorsuui 'aide attenuata, uervisqueinnumeris,perquani 
approximatis, parallelis, obliquis,elevatis, parutn ramosiset auastomosantibus, vcisus mar- 
ginem arcuatis. vcnulaque gracili connexisj i tiler medium ovato-cllipticum, basi attenua- 
tnm, eostuque robusta quasi peliolatum; lateralia pateutissima, illo parum angustiora, 
semi-cordata, latere interim baseos valde oblique, subexsciso, externo producto in lobum 
magnum, rotundatum, quadripollicarem, lobo folioli oppositi fere contiguura. Siapvs 
petiolo dim id id brevior, basi sexpollicari ab hnjus parte inferiore amplexus, erectus vel 
obliquus, nunc subrecurvus, teres, digitum minimum crassus, apicem incrassatam versus 
plirpurascens. Jnjlorescentia tertninalis, ereeta, inodora, dioica, spcciosa; maseula 
(fig. 1. minor, gracilior. Spatial atropurpurea, extus ornata Striis alius, parallelis, latis, 
versus apicem limbi anastomosi duplici, ab invicem parum distant i, connexis, intus cos- 
tata cariHis iotidem angustis, attenuatis; tubus cylimlraceo-convolutus, tripollicaris; 
faux ampla, parum obliqua, nuda, margine leviter revoluta ; Undns integer, ovatus, ad- 
scendens, foruicatus, a pice nutans, acuta, tcrn.inata processu, vel acumme liliformi, tereti, 
descendente, polltcari, concolore; in maseula limbus, una cum processu isto obliquo 
adscendit. Spadi.v gracilis, basi inclusa, bipollicaris, teres purpurea, et maxim* parte 
ohterta organis fruclificationis, superne nuda et absque orgauis stcrilibus appendici- 
busvo. Clara gracilis, teres, atropurpurea, basi cuneata, propter rugos longitudinalc.s 
sublobata, infra forniceni leviter ventricosa, mox vero abiens in flagellum graeillimuin. 
loninssituum 
0 
undulatum, exsertum, obliqud desceudcus, coucolor, processum sputha? 
