CORRESPONDENCE. 319; 
The whole number of species known to produce double flowers now 
amounts to 290,—242 Exogens, and 48 Endogens, 171 Polypetale, 
69 Monopetalz, and 2 Apetalz, distributed over 53 Natural Orders.— 
B. Seemann 
CORRESPONDENCE. 
Orchis pyramidalis flore pleno. 
Glasnevin, Sept. 2 
Tn the ‘Journal of Botany’ for last June you give a list of plants which are 
On a plant so remarkable in this respect as an Orchid, ui Masters has, no 
doubt, published some observations which have escaped my notice. It would 
have added interest to the present DEER TEENE had I abi able to compare 
his remarks wd any have been made) with my own. 
Three y , Mr. Frederick J. ka who is attached tò the Geological 
Survey « ofi Ded, as Assistant Geologist under Professor Jukes, and who i is also 
ing on the limestone débris near — County of Clare, which — 
stance Mr. Foot noticed two years ago in a paper he read before the Roya 
Irish Academy on the rarer plants of that county. 
During the present season, one of the roots sent by that gentleman flowered 
at Glasnevin, and enabled me to observe the nature of some of the malforma- 
tions which take place in the parts of the flower. The increase of sepals and 
lateral petals appears to be the result of collateral chorisis in the ordinary way. 
e labellum is rather thick and somewhat fleshy, much divided at the apex, 
til, to which the pollen masses are still adhering with stalks, w are firm 
and tough. Their pouches are converted into ae -like nni, and filled 
up with same. There are also two more similar bodies partly formed, which 
Are sessile, and placed nearer the apex vi si naa leaf, thus showing incipient 
