378 SCIENCE PROGRESS. 



teresting to add that orchids stand third in the flora of the 

 whole world, and they also take the same position in the 

 flora of Mexico and Central America. 



Returning to the Bourbon orchids ; the regional char- 

 acteristic AngrcBCum is credited with eighteen new species, 

 and a total of thirty-two species. There are also new 

 species of the epiphytal genera Bulbophyllum, Aeranthus, 

 and Saccolabinm ; but the bulk of the new ones are terres- 

 trial plants, many of them very rare and inconspicuous, and 

 most of them of short duration above ground. 



On this point Cordemoy says : " J 'en ai moi meme 

 plusieurs nouvelles, en herbier, que leur mauvais etat de 

 conservation ne permet pas de decrire. Certainement il 

 en existe d'autres non encore decouvertes, surtout parmi 

 les Ophrydees, dont plusieurs parcourent, en quelques 

 semaines, la periode active de leur vegetation, puis se 

 replient immediatement, pour passer le reste de l'annee sous 

 terre a l'etat de tubercule. Plusieurs localites n'ont pas ete 

 suffisament explorees.' r 



Three new genera of this group are described, namely, 

 Acrostylia, Camilleugenia and Hcmiperis ; the first two 

 being monotypic and the third having twenty-one species 

 ascribed to it. All three would be included under Habenaria 

 by some authors ; but in this extended sense Habenaria is 

 a vast and heterogeneous agglomeration of species. 



Among other genera, of which several new species are 

 described, I may mention Dombeya, Evodia, Eugenia, 

 Embelia, Sideroxylon, Geniostoma, Psiadia and Faujasia. 



In addition to the new genera of orchids, four others 

 are proposed, namely, Guya (Bixaceae), Herya (Celas- 

 tracese), Allocalyx (Scrophulariacese), and Mahya (Labiatae). 

 According to the author's own admission, three out of 

 the four are somewhat doubtful, and the affinity of the 

 fourth is not given more definitely than by placing it in the 

 tribe Menthese. But Alahya stellata is an interesting plant, 

 whatever its affinity, because it is believed to be the only 

 really indigenous member of the Labiatae. It is a dwarf 

 shrub, very rare, and found only near the summit of the 

 Grand Benard, at an elevation of about 8650 feet. 



