Briefe. 
117 
only tree, I know Stands in a garden but I had not even suspected that it was 
planted there and still less (as we are here rieh in Mimoseae) that the species had 
been introduced from India. 
The Oncidium flexuosum is an endemic species and is even the most common 
species of that genus. 
There is novv flowering another common species of the genus, probably the 
O. micropogon Rchb. fl. in which the same individual plants pollen and stigma 
have the same deletery action on each other as in One. flexuosum, unicorne and 
pubes (?). This I also found to be the ease with a species of Gomeza RBr. 
(Rodriguezia Ldl.) and with a small but extremely pretty Sigmatostalix Rchb. f. 
(tricolor n. sp. ?)*). The same plants of Gomeza and the several species of O, on 
which I ascertained this fact, were fertile with pollen of other plants of the 
species. 
Of Sigmatostalix I have only one flowering plant. Another allied species which 
is even placed in the same genus (Odontoglossum) with Gomeza by Mr. Rchb., 
viz. Aspasia lunata is fertile with own pollen ; I had a single flower, which being 
fertilized with its own pollen is yielding a seed-eapsule. 
I have now had several ears of the Notylia (pubeseens?) of which I could 
not fertilize the fm. flowers, I observed last year. The stigmatic slit, extremely 
narrow when the flower expands, widens graduaUy in the course of the next 
days and two or three days afterwards fertilization is rather easily effected. Even 
on the first day I sometimes succeeded in introducing dry pollinia. As in our 
other species the same individual plants pollen soon becomes blaekish brown in 
the Stigmatie Chamber, while pollen from any other plant of the species remains 
fresh, emits tubes etc. 
AU the Epidendreae, I tried (Cattleya, Epidendrum, Brassavola, Leptotes)^ 
are fertile with own pollen ; but from some experiments on Epid. cinnabarinum 
I suspeet, that they will be less fertile with own than with an other plants pollen. 
From several flowers fertilized (Decbr. 20) with their own pollen I obtained two 
pods (ripe Febr. 19, 20), the seeds of each of which weighed 5 grains. An ear 
of another plant the flowers of which were fertilized with pollen of a distinct ear 
of the same plant yielded two pods (ripe Febr. 18 and 20) the seeds weighing 
5.5 and 6 gr. 
A seeond ear of the same plant, after fertilization with pollen of a distinct 
plant of the species (Dec. 20) produeed a pod (ripe Febr. 17), the seeds of which 
weighed 12.5 gr. 
Three capsules of a third plant, fertilized (Decbr. 21) with pollen of a distinct 
plant (ripe Febr. 17) contained 26 grains of seeds; (each capsule, on an average, 
8.7 grains). 
Lastly, and this is rather curious, a pod of a fourth plant, fertilized (Dec. 21) 
with pollen of a distinct species (Epid. Schomburgkii ?) (ripe Febr. 17) was larger 
than all the other pods, and its seeds weighed 14 gr. 
A second pod of Ep. cinnabarinum, fertilized (Jan. 18) with pollen of Ep. 
Schb. is also much larger than several pods fertilized (Jan. 17) with pollen of the 
same species (Fig. 36). 
I) Siehe die Tafel S. 87. 
