4 68 



ANGI0SPERMAED1C0 TYLEDONES 



the var. intermedia a Syrphid (Syrphus balteatus Beg.) : also on the var. involucrata 

 Koch. A. Coleoptera. Coccinellidae : i. Coccinella quatuordecimpunctata Z., 

 nect-lkg. B. Diptera. Syrphidae: 2. Eristalis nemorum Z. C. Hymenoptera. 

 (a) Apidae: 3. Prosopis sp. <j>, po-cltg. (<5) Sphegidae: 4. Oxybelus uniglumis 

 Z. $. 



1093. A. minor L. (Herm. Miiller, ' Alpenblumen,' pp. 1 14-16.) The her- 

 maphrodite flowers of this species are protandrous ; there are also transitions between 

 andromonoecism and androdioecism. (Cf. Fig. 158.) 



Visitors. Herm. Miiller saw a few Muscids. 



1094. A. helleborifolia Salisb. 

 Visitors. Loew saw a Muscid (Anthomyia sp.). 



1095. A. neglecta Koch et Bouche. 



Loew observed the following in the Berlin Botanic Garden. 



A. Diptera. Syrphidae: 1. Eristalis nemorum Z.; 2. E.tenaxZ. B. Hymeno- 

 ptera. (a) Apidae: 3. Sphecodes gibbus Z. 5, skg. (6) Sphegidae: 4. Crabro 

 spinicollis H.-Sch. 5; 5. Oxybelus sericatus Gerst. $; 6. Philanthus triangulum F. $>. 

 C. Lepidoptera. Rhopalocera : Vanessa urticae Z., skg. 





Fig. 159. Eryngiutn mari/imunt \ L. (1-4, enlarged four times from photographs. 5-7, drawn from 

 nature.) (1) Trifurcate bracteole. (2) Late flower-bud; the filaments are still incurved. (3) Flower in the 

 first (male) stage ; the anthers have all dehisced ; the stigma is not yet mature. (4) Flower towards the 

 end of the second (female) stage ; the petals and stamens have fallen off ; the stigma is mature. (5) Nectar- 

 secreting disk (X 8). (6) Petal from within ( x 5). (7) The same from the side. a. stamen; , base of 

 style ; , nectary ; ov, ovary ; />, petal ; s, stamen ; s/, stigma. 



322. Eryngium L. 



Flowers belong to class S; arranged in dense capitate umbels; whitish or 

 amethyst-blue in colour; protandrous; with concealed nectar, secreted by 

 epigynous io-rayed disk, and protected by the inwardly turned tips of the erec 

 petals. The stiff and extremely sharp involucral bracts and sepals serve as 

 further protection, as do also the rigid spinous-toothed foliage-leaves. Conspicuous- 

 ness is brought about not only by the petals, but in some cases by the involucr 

 as well, and even the peduncle may contribute to this end (E. maritimum Z. anc 

 E. amethystinum Z.). 



1096. E. maritimum L. (Knuth, *B1. u. Insekt. a. d. nordfr. Ins.,' pp. 76-8, 155 ; 

 Loew, ' Bliitenbiol. Floristik,' p. 390.) The protandrous flowers of this species are 



