TRANSACTIONS OF SECTION K. 1013 
The tubers formed at the end of these stolons bear buds which grow out into 
resh rhizomes, the first internodes of which are very narrow and much elongated ; 
in these, again, the vascular bundles (four to seven in number) exhibit a different 
arrangement, for they present none of the confusion found in the mature rhizome, 
but run perfectly longitudinally ; either they all keep separate, or a varying number 
of them may be united to form pairs. Whensix ofthem are present and these are 
arranged in three pairs, the section presents a remarkable resemblance to that of 
the floral peduncle of Cabomba aquatica. 
Again, in the rhizome itself the arrangement is not altogether astelic, for by 
the aggregation of the separated bundles of the stem a number of steles are 
formed, one in the region below the point of insertion of each leaf. These groups 
_ of bundles appear to be set apart for the especial purpose of bearing the adventi- 
tious roots, and they are to be found in varying degrees of perfection throughout 
the order. I found Victoria regia and certain species of Mymphea to possess the 
most perfect root-bearing steles; they are composed of ten to twenty bundles 
arranged in a ring, and are perfectly distinct and well defined. On the other 
hand, in other species of Nymphea and in Nuphar the bundles set apart for bearing 
the adventitious roots are not arranged in a sufficiently regular manner to be con- 
sidered as a stele, or are only laterally fused together to form an arc of greater or 
less extent. 
2. The Influence of Habitat upon Plant-Habit. 
By G. F. Scort Enntot, B.Se., F.L.S., F.R.G.S. 
W The paper is an attempt to tabulate and compare the habits and habitats of 
the Ranunculacee, Papaveraceze, and Crucifere in the Kew and British Museum 
Herbaria, or those from the European and Mediterranean floras practically. 
There were only 230 plants in which such tabulation of both habit and habitat was 
possible. The author’s tables are given below, and the paper is explanatory of 
them, giving the result of recent literature and experiment so far as it illustrates 
or explains the tables. The dependence of habit upon habitat is shown to be very 
clear throughout. In conclusion, the author anticipates the objections of those 
who hold the original hypothesis of Professor Weismann (that acquired characters 
can by no means be inherited) by pointing to the most recent publication of this 
writer, wherein use-inheritance of a kind is admitted. In any case the corre- 
spondence must be explained by those who deny any relation between ‘habit and 
habitat on purely theoretical grounds. 
TABLE I.— Rosette Plants. 
‘Cerastium macranthum . Rocks Algiers Alyssum, 5, 6,7 . F . Atnens 
a scaposum . Rocks Crete | Diplotaxis 3, 5, 6 (only if 
4 campanulatum. Sand Naples | grown in ° . . Exposed places) 
Iberis 19. ri F . Dry places | Fy 10 5 5 + Sandy waysides 
Lychnis alpina . - .« Rocks? | 11 Su is - Seaside 
Thlaspi 6,’ 8, 10, 20, 21,23. Rocks 9 13 - Midian desert 
Sisymbrium 32 . 6 - Desert | Sinapis10 . : . Calcaire aride 
Arabis 6, 10, 21, 12, 13. .« Rocks | Brassica 24 , : : . Algeria 
Oardamine 13, 14,15 . . Alpine rocks | Lepid*um 21, 22, 23 Stony mounta. s 
TaslLeE Il.—Rock Plants. 
Farsetia,1,2,3. .  . Very woolly plants | Euromodendron . . An ericoid shrub 
Sinapis 4 . : . . More hairy than usual Matthiola 7 < . Very woody 
Fumaria27 . Fleshy leaves | Turritis Near water in sheltered 
Iberis 18 . . . Fleshy leaves | Arakis 1, 2, 3, 4,5 } { elens 
Tas.e ITI.—Downy, Hairy, or Woolly Plants. 
Ranunculus § (variety) - at Alyssum 5, 6, 7 - Athens 
hinium 14 z . Dese > ; : DI Eee 
i. ” 7 - ‘. Greece | Sisymbrium 32 4 eae ele! 
op nanum. . Stony places Malcolmia 9, 10 +  . Spain, Algiers 
Matthiola5 . . . Desert / % ll. .  . Maritime sands 
Vella i * 4 . Mom. calear., Spain Cerastium latifolium  . Alpine 
Farsetial,2,3. . . Dry rocks | ” tomentosum . Mountains, Greece 
Aubrietia . -  « Syria, arid places { a pedunculatum i 
” » 
1 The numbers correspond to those in Nyman’s Cox: pectus, 
