ASCIDIA IN GASTERIA AND AGAVE. 129 
the treatment in the work of Masters* is largely taken, 
though some differences are to be noted. Penzig’s t 
lists are extensive, but his arrangement is purely a sys- 
tematic one. 
Since Masters’s work no general treatment has appeared 
but several individual cases have been described and some 
important papers bearing directly or indirectly on the sub- 
ject have been published. Of these, one by Penzig ¢ and 
three by De Candolle § should be especially mentioned. 
None of the ascidia described in these papers are at all 
comparable with those here discussed except, perhaps, 
those of Tulipa, Polygonatum, Convallaria, Lilium, 
Acanthophippium and Vanilla. . 
The calyptriform ascidium of Tulipa Gesneriana was 
first mentioned by Hincks || who described it as ‘‘ a speci- 
men of Tulipa Gesneriana, in which the leaf on the stem, 
folding around it, had cohered by its edges, so as to com- 
pletely enclose the flower-bud, which, as it enlarged, car- 
ried up the upper part of the leaf, like the calyptra of a 
moss.’’ Saint-Pierre J describes a similar anomaly. 
Hincks also mentions a plant of Convallaria multiflora 
‘¢in which the two lowermost leaves cohered by their edges 
into a sort of a bag, which considerably obstructed the 
growth of the stem.”’ 
Kicks merely mentions a tubiform monophyllous asci- 
dium in Lilium lancifolium. He also observed ** a fusi- 
form-cylindrical ascidium of nearly two decimeters in 
length on the leaf of Acanthophippium bicolor. - James ft 
* Masters, M.T. Vegetable Teratology. London. 1869. 
+ Penzig, O. Pflanzen-Teratologie. Genua. 1890-’94. 
¢ Penzig, O. Malpighia. 16 167-175. pl. 4-6. 1902. 
§ De Candolle, C. Bull. Soc. Bot. Genéve. 8 3 61-69. 1897; 9¢ 1-51. 
1899. — Bull. Herb. Boissier. II. 2: 753-762. pl. 8-9. 1902. 
|| Hincks, W. Rept. Brit. Ass. Adv. Sci. 7: 120. 1839. 
{ Saint-Pierre, G. Bull. Soc. Bot. Fr. 1363. 1854. 
** Kickx, J. Bull. Acad. Roy. Sci. Belg. 18!3 591. 1851. 
tt James. Gard. Chron. n. s. 153799. 1881. 
