SCIENCE. 



[Vol. XXI. No. 533 



Chart of the Monocotyledons. 



OrchHeEe 



I 

 Burmanniace® 

 I 

 Hydrocbarldese 

 I 

 I Naladaceffi 



Pontederiaceae" 



Bromellacese 



jEemordoraceee 



Dioscoreace© 



Juncaceaa 



Gramineae Xyrldese— Mayaoea 



Roxburghlacese 



Cyperacese 



ErIocaulesB 



Cyclacanthacese Typliacese 

 LemnaceEB 



CentrolepodesB 



placing of Orchideae at the head of one alliance, and Gramine« 

 of another, agrees with the general scheme. Again, among the 

 dicotyledons Compositse is regarded as the higheet and Ranun- 

 culacesB is placed well down in the scale. The whole arrange- 

 ment is that of Engler and Prantl,= but it corresponds so well 

 with the provisional outline suggested by the writer of this that 

 he has called attention to it. 

 Professor MacMillan's plan in the citation of authorities is in 



" Natur. Pflanzenfam , 1887-1893. 



all cases to preserve the original specific name, except when this is 

 the same as the genus, when the next oldest name is substituted. 

 This is in accordance with the rules adopted by the botanists of 

 the American Association for the Advancement of Science. All 

 may not agree to this exception, but to the present writer it seems 

 the better plan. Another feature, more or less of an innovation 

 in botany, is to use lower-case letters instead of capitals in all 

 specific names, no matter what the source from which they have 

 been derived. This is the plan adopted in some of the other 

 sciences, notably in paleontology, and it is being rapidly adopted 

 by botanists. 



Inasmuch as the old divisions of the Dicotyledons — Polypetalse, 

 Gamopetalse, and Apetalae — have been discarded, a new series of 

 terms is needed, and those adopted in the volume are as fol- 

 lows: — 



Division A. — Protophyta. 



Division B. — Metaphyta. 



Plants where sexuality has not been (A) or where it has been 

 developed (B). Under B we have: — 



(I.) Gamophyta, which develop sexual plants from their eggs 

 without any spore-producing structure intervening, such as pond 

 scums, black mold, and alg» like CEdogonium ; and 



(II.) Sporophyta, in which the fertilized egg is divided into a 

 cellular structure capable of growth, and consists of a spore from 

 which sexual plants are produced. 



Then comes the division of (II.) into (1) Thallophyta, (2) Arche- 

 goniata, and (3) Metaspermse. In (1) are included the great mass 

 of sea-weeds, algee, and fungi. In (3) we have Cliara, Nitella, 

 coniferous trees, the extinct Lepidodendron, etc., and in (3) we 

 have those forms producing seeds in a closed ovary. Finally 

 the Metaspermse are divided into two groups: (a) Archichalydese, 

 without a perianth or having one made up of separate leaves^ 

 about equal to the old groups Apetalse and Polypetalse, and (&) 

 MetachlamydesB, in which the perianth leaves are united, and 



CALBNDAB OF SOCIETIES. 



Anthropological Society, Washington. 



April 18. — J. Owen Dorsey, Siouan Pho- 

 netic Types; James Mooney, The Indian 

 Messiah and the Ghost Dance (illustrated 

 by Lantern Slides); Henry Gannett, Esti- 

 mates of Wealth. 



Society of Natural History, Boston. 



April 19. — J. B. Wood worth, Traces of a 

 Fauna in the Cambridge Slates ; Charles P. 

 Bowditch, Ruins of Central America. 



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