Mechanism in the Compo sitae . 263 
Genus and Species. 
Place of 
Observation. 
t vC Remarks. 
Irritability. 
Ammobium alatum, R. Br. 
K.R.B.G. 
A 
slight (1) 
Anacyclus officinarum, Heyne 
K.R.B.G. 
C 
distinct 
Anaphalis margaritacea,Benth. and Hook. 
E.R.B.G. 
C 
distinct 
Anthemis canescens, Brot. 
E.R.B.G. 
A 
distinct 
Anthemis montana, L., v. grandiflora 
K.R.B.G. 
C 
distinct 
x Anthemis nobilis, L. 
F. 
C 
slight 
X Anthemis tinctoria, L. 
F. 
C 
distinct 
Arnica alpina, Olin and Ladau. 
E.R.B.G. 
B 
distinct 
Aster acris, L. 
E.R.B.G. 
C 
distinct 
Aster Candollei, Harv. 
K.R.B.G. 
A 
slight 
Aster Lipskyi (Hort.) 
K.R.B.G. 
C l 
marked 
Aster longifolius, Lam. 
E.R.B.G. 
c 
variable 
X Aster paniculatus, Lam. 
E.R.B.G. 
A 
slight 
Aster stellaris, (Hort.) 
K.R.B.G. 
C 
variable 
Balduinia multiflora, Nutt. 
E.R.B.G. 
C 
slight but distinct 
X Beilis perennis, L. 
F. 
C 
distinct (2) 
Buphthalmum salicifolium, L. 
K.R.B.G. 
B 
distinct 
Buphthalmum speciosum, Schreb. 
E.R.B.G. 
C 
slow 
X Calendula officinalis, L. 
K.R.B.G. 
A 
slight (1) 
X Carduus crispus, L. 
K.R.B.G. 
C 
distinct (16) 
X Carduus nutans, L. 
K.R.B.G. 
C 
distinct 
X Carduus tenuiflorus, Curt. 
F. 
B 
distinct 
Cassinia Vauvilliersii, Hook. f. 
E.R.B.G. 
A 
distinct 
Catananche caerulea, L. 
K.R.B.G. 
C 
marked (3), Juel re- 
cords as ‘irritable* 
Catananche caerulea, L., v. alba. 
K.R.B.G. 
C 
very marked (3) 
Celmisia coriacea, Raoul. 
E.R.B.G. 
C 
distinct 
X Centaurea aspera, L. 
Rouen B.G 
B 
distinct 
Centaurea atropurpurea, Waldst. and Kit. 
E.R.B.G. 
C 
slight 
Centaurea axillaris, Willd. 
K.R.B.G. 
C 1 
distinct 
x Centaurea Cyanus, L. 
F. 
C l 
previously recorded 
as ‘ irritable * 
Centaurea dealbata, Willd. 
K.R.B.G. 
C 
distinct (12) 
Centaurea montana, L. 
C.U.B.G. 
C 
distinct (12) 
Centaurea montana, L., v. alba. 
C.U.B.G. 
C 
distinct 
Centaurea montana, L., v. lugdunensis, 
Jord. 
K.R.B.G. 
C 
distinct 
X Centaurea nigra, L. 
F. 
c 
distinct but variable 
Centaurea praealta, Boiss. and Bal. 
E.R.B.G. 
c 
distinct 
x Centaurea Scabiosa, L. 
E.R.B.G. 
c 
distinct (16) 
Centaurea sordida, Willd. 
E.R.B.G. 
c 
marked 
Centaurea variegata, Lam. 
E.R.B.G. 
c 
distinct 
Charieis heterophylla, Cass. 
K.R.B.G. 
c 
marked 
