NAIADACEAE 509 



2960. Z. nana Roth. (Knuth, 'Bl. u. Insekt. a. d. nordfr. Ins.,' p. 138.)— The 

 flower mechanism of this species no doubt agrees with that of the preceding one, but 

 hitherto I have never been able to find it in flower, although I have examined an 

 extremely large number of plants, particularly near the Halligen. The species there 

 propagates very abundantly in a vegetative manner. 



969. Posidonia Kon. 



The flowers of species belonging to this genus are protogynous. (Delpino, 

 'Ult. OSS.,' II, pp. 6-7.) 



CXXIV. ORDER CYPERACEAE JUSS. 



(Numerous memoirs by Appel mnst be added to the bibliography for this order.) 



All the species of this order are anemophilous. In all species so far examined 

 cross-pollination by protogyny, more rarely by protandry or dioecism, is favoured. 



The Danish species of Cyperaceae examined by Raunkjaer (Bot. Tids., Kjoben- 

 havn, xviii, 1893, pp. 19-23) are all protogynous, though to different degrees. He 

 mentions the following species : — Carex digitata Z., C. caespitosa Z., C. stricta Good., 

 C. montana Z., C. pilulifera Z., C. remota Z., C. cyperoides Murr., C. axillaris Good. 

 (= C. Boenninghauseniana Weihe), C. paniculata Z., C. paradoxa Willd., C. teretiu- 

 scula Good., C. vulpina Z., C. muricata Z., C. elongata Z., C. pallescens Z., C. flava 

 Z., C. sylvatica Huds., C. distans L., C. fulva Good., C. chordorrhiza Z., C. arenaria Z., 

 C. disticha Huds., C. incurva Light/., C. dioica Z., C. vulgaris Fries (= C. Goodenowii 

 J. Gay), C. gracilis 7?. Br., C. praecox Jacq. (= C. verna VilL), C. ericetorum Poll., 

 C. panicea Z., C. flacca, C. limosa Z., C. rostrata Z., C. vesicaria Z., C. paludosa 

 Good. (= C. acutiformis Ehrh), C. riparia Curt., C. filiformis Z., C. hirta Z., 

 Rynchospora fusca Ait., Cladium germanicum Schrad. (= C. Mariscus R.Br.), 

 Eriophorum polystachion Z., E. angustifolium Roth (=E. gracile Sm.), E. vaginatum 

 Z., Scirpus sylvaticus Z., S. pauciflorus Light/., and others. 



I can confirm Raunkjaer's statements with regard to the species of this order 

 native to Schleswig-Holstein. Those collected in this province which I have in my 

 herbarium are all more or less protogynous. This applies to the flowers of the 

 hermaphrodite and the inflorescences of the monoecious species. They are the 

 following : — 



Pycreus flavescens Beand. (= Cyperus fiavescens Z.), Cyperus fuscus Z., 

 Cladium germanicum Schrad. (= C. Mariscus Z.), Rynchospora alba Vahl, Eleocharis 

 palustris R. Br., E. multicaulis Sm., E. acicularis R. Br., Scirpus caespitosus Z., 

 S. pauciflorus Light/., S. nanus Spreng., S. fluitans Z., S. setaceus Z., S. lacustris Z., 

 S. triqueter Z., S. pungens Vahl, S. maritimus Z., S. sylvaticus Z., S. radicaas 

 Schkuhr, S. Caricis Rdz., S. rufus Schrad. Eriophorum alpinum Z., E. vaginatum 

 Z., E. angustifolium Roth, E. latifolium Hoppe, E. gracile Koch. Carex dioica Z., 

 C. pulicaris Z., C. arenaria Z. (= C. ligerica /. Gay), C. disticha Huds., C. muricata 

 Z. {— C. virens Lam.), C. vulpina Z., C. paniculata Z., C. teretiuscula Good., 

 C. paradoxa Willd., C. Schreberi Schrank, C. remota Z., C. echinata Murr. (= C. 

 stellulata Good.), C. leporina Z., C. elongata Z., C. canescens Z., C. stricta Good., 



