Bd. XCIX. No. 4. XXVI. Jahrgang. 



Botaiiisclies Ceutralblatt. 



Referirendes Organ 



der 



Association liiternatioiiale des Botanistes 



für das Gesammtgebiet der Botanik. 



Herausgegeben unter der Leitung 

 des Präsidenten: des Vice- Präsidenten : des Secretärs : 



Prof. Dr. R. v. Wettstein. Prof. Dr. Ch. Flahaiilt. Dr. J. P. Lotsy. 



und des Redactions-Commissions-Mitglieds : 



Prof. Dr. Wm. Trelease. 



von zahlreichen Specialredacteuren in den verschiedenen Ländern. 

 Dr. J. P. Lotsy, Chefredacteur. 



No. 30. 



Abonnement für das balbe Jabr 14 Mark 



durch alle Buchhandlungen und Postanstalten. 



1905. 



Alle für die Redaction bestimmten Sendungen sind zu richten an Herrn 

 Dr. J. P. LOTSY, Chefredacteur, Leiden (Holland), Rijn-en Schieliade 113. 



Holm, Theo, Anemiopsis Califomica (Nutt.) H. et A. An 

 anatomical study. (American Journal of Science. XIX. 

 p. 76—82. pl. 1—6. Jan. 1905.) 



The rhizome is horizontal and bears several strong roots; 

 its ramification is monopodial. the apical bud being purely ve- 

 getative, while the stolons and inilorescences develop from the 

 leai-axils. While the flowers are destitute of fore-leaves, such 

 occur at the base of the stolons and flower-bearing stems; they 

 are two in number/ membranaceous, scale-like, one-nerved and 

 carinate. 



In regard to the structure of the large, green leaves, the 

 cuticle is thick and wrinkled, and the epidermis is very small- 

 celled with stomata on both faces, most numerous on the upper. 

 The stomata have no speziaiized subsidiary cells, but are sur- 

 rounded by four to six epidermis-cells. The hypoderm of the 

 Upper face of the blade consists of very large, cone-shaped cells, 

 vertical on the surface. The leaf is dorsiventral. 



The structure of the fore-leaves, the involucre and the floral 

 bracts is, also, described. 



Characteristic of the stem above ground is a wrinkled 

 cuticle covering a small-celled epidermis, underneath which 

 there is an hypoderm of a single layer of very large, roundish 

 cells. The cortex contains Chlorophyll and the innermost Stra- 

 tum is differentiated into an endodermis, which surrounds a 

 continuous ring of very thick-walled stereome. Directly bor- 

 dering on the stereome is a circle of 24 collateral mestome- 



Botan. Centralbl. Bd. XCIX. 1905. 6 



