COKFOBMATION OE THE OE^US CTPRIPEDITJM. 



419 



in which there were three free sepals, two lateral petals, and one 

 flat lip, like the other petals in shape but broader. The column 

 had the usual staminode Ax 

 and two fertile stamens, ai 

 and a 2, with, in addition, a 

 third stamen as, projecting 



Fig. 10. 



in front of the stigma. 



The 



stigma itself was three-lobed, 

 the posterior lobe Gri being 

 of the usual large size, the 

 two lateral lobes smaller ( 

 figs. 9, 10). The formula for 

 this very interesting flower 

 is thus 3S 3P X 3a 3G. 

 The usual zygomorphic state 

 was replaced by an actino- 



Plan of peloriate flower of SelenU 



pedium (see fig. 9). 



morphic condition, as is met with in some Dendrobes, Paxtonia^ 

 Thelymitra^ Phalceno^sis^ Telipogon, &c, Endhcher's ThelycJiiton 

 (Endl. Gen. IGIG) may also be mentioned as a pelorioid form 

 with a regular perianth and a cup-like androecium, one lobe 

 of which bears an anther. 



In a specimen of C. cauclatum sent me by Mr. Bull (see 

 Plate XX.) the three sepals were free, the lateral petals as usual 

 prolonged into the long tails, which constitute so remarkable a 



feature of the species, while tlie median petal, instead of having 

 the form of a long sac, something like the finger of a glove, was 

 partially flattened out and partially contorted — presenting, in 

 fact, an intermediate condition between that of the ordinary lip 

 and that of one of the ordinary lateral petals. The median 

 stamen of the outer row, Ai, was present as a staminode ; and the 

 ear-like process on either side of \t possihly represented the two 

 lateral stamens of that series, A2, A3, though, from the analogy 

 of other cases, I am more disposed to regard them as sterile 

 branches of Ai, and to consider that A2, Aa were absent. The 

 three inner stamens, ai, a2, as, were all present and all fertile. 

 The ovary was, as customary in this plant, 3-celled. So that 

 there was in this flower a tendency towards regular peloria, and 



ungsber. d. Botan. Vereins d. 'Prow Brandenburg/ xxi. January 31, Juue 27, 

 and November 28 (1879); also his " Kurze Notiz iiber dimere Zygomorpbie 

 OrcLideenbliithen und iiber ein monstrosea Cppripedium,'^ in the Abhandlung. 

 d. Bot. Vereins Prov. Brandenburg, xxi. p. 97. 



2m2 



