76 Sargant. — Theory of the Origin of Monocotyledons 
The following list of the best-known pseudo-monocotyledons 
is no doubt very imperfect. The only species in it which 
I have examined is Cyclamen persicum . Its vascular structure 
suggests very strongly that the cotyledonary member consists 
of two seed-leaves united into a solid tube, but until the 
structure of allied genera has been worked out no great weight 
can be attached to this observation. Bernhardi (4, p. 578) 
suggests this origin of the single seed-leaf on the ground that 
the cotyledons of Dodecatheon Meadia are united into a tube. 
Lord Avebury remarks that when Cyclamen is raised from 
seed abnormal specimens are not uncommon in which the 
cotyledons have divided blades (Lubbock, 30, II, p. 184). 
TABLE II. 
Pseudo-monocotyledons. 
Fiimariaceae. 
Corydalis tuberosa, D.C. ( = 
C. solida and C. cava) . . 
C. fabacea 
Dicentra Cucullaria, Bernh. 
(= Capnorchis Cucullaria) 
Irmisch, 25 (Fig.). 
Bischoff, 5 (Fig.). 
Irmisch, 25 (Fig.). 
Irmisch, 25. 
Umbelliferae. 
Carum Bulbocastanum . . 
C. alpinum, Benth. and Hook. 
(= Bunium petraeum, Ten.) 
Erigenia bulbosa, Nutt . . 
Primulaceae. 
Cyclamen persicum .... 
L en tibidarieae . 
Pinguicula vulgaris . . 
P. grandiflora 
Irmisch, 21, p. 17 (Fig.). 
Bernhardi, 4, p. 575. 
Holm, 20, p. 63. 
Darwin, 10, p. 78 (Fig. 57). 
Lubbock, 30, II, p. 184. 
Bernhardi, 4, p. 583. 
Buchenau, 6, p. 64 (Figs. 
1 and 2). 
Dickson, 11. 
Dickson, 11. 
