LABIA TAE 307 



731. Leonurus L. 



Protandrous to homogamous bee flowers; with nectar secreted and concealed 

 as usual. 



2362. L. Cardiaca L. (Sprengel, 'Entd. Geh./ p. 310; Herm. MuUer, 'Weit. 

 Beob.,' Ill, p. 48, * Alpenblumen,' p. 312; Knuth, ' Bloemenbiol. Bijdragen'; Loew, 

 'Bliitenbiol. Floristik,' p. 391 ; Kirchner, 'Flora v. Stuttgart/ p. 632.) The pale-red 

 corolla of this species bears nectar-guides on the lower lip, the filaments, and the 

 mouth of the upper lip, in the form of dark-purple spots. The two anterior stamens 

 bend sideways after dehiscence. The corolla-tube is only 4 mm. long. Warnstorf 

 describes the pollen-grains as white in colour, ellipsoidal, delicately tuberculate, about 

 35 /li long and 15-18 /x broad. 



Visitors. The following were recorded by the observers, and for the localities 

 Stated. 



Sprengel, humble-bees. Knuth, the humble-bee Bombus lapidarius $ and J, skg. 

 Loew (Brandenburg), the bee Coelioxys rufescens Lep. J, skg. (' Beitrage,' p. 44) : 

 (Berlin Botanic Garden), on the van villosa the humble-bee Bombus agrorum F. J, 

 skg. Herm. Miiller (Bavarian Oberpfalz), the honey-bee and 3 humble-bees 

 I. Bombus agrorum F. '<^', 2. B. pratorum Z. 5; 3' B. tristis Seidl. 5^, all skg.: 

 (Alps), the humble-bee Bombus lapidarius L. 5, skg. 



2363. L. MarrubiastrumL. (=Chaiturus Marrubiastrum6/5^.). (Warnstorf, 

 Verb. bot. Ver,, Berlin, xxxviii, 1896.) Warnstorf says that in this autogamous species 

 the yellow anthers are borne on short filaments and enclosed in the corolla. They 

 are beset with viscid spherules. The slightly curved corolla-tube is 5 mm. long. The 

 pollen-grains are white in colour, irregularly tetrahedral, feebly tuberculate, on an 

 average 37 /x in diameter. 



Visitors. Knuth observed the following bees, all skg., in the Kiel Botanic 

 Garden. 



I. Apis mellifica Z. 5; 2. Bombus hortorum Z. 5 (a variety); 3. B. pratorum 

 Z.; 4. B. lapidarius Z., one 5 (between 8 and 9 a.m., 30. 8. '98) visiting successive 

 verticillasters, and going steadily from plant to plant, in spite of sharp showers of 

 rain and a strong wind. 



Gerstacker (Berlin) saw the bee Coelioxys aurolimbata Foerst. 



2364. L. lanatus Pers. 



Visitors. Loew observed the following in the Berlin Botanic Garden. 



A. Coleoptera. CoccinelUdae \ i. Coccinella bipunctata Z., resting outside 

 the entrance of the flower. B. Hymenoptera. Apidae: all skg. : 2. Anthidium 

 manicatum Z. $; 3. Apis mellifica Z. ; 4- Bombus agrorum F. 5 and S; 5. B. 

 terrester Z. 5 ; 6. Psithyrus rupestris F. $. 



732. Scutellaria Riv. 

 Homogamous to protandrous bee flowers, apparently possessing a Lepidopterid 

 door. Nectar secreted and concealed as usual. 



2365. S. galericulata L. (Sprengel, 'Entd. Geh.,' p. 312 ; Herm. Miiller, 

 * Fertilisation,' p. 486 ; Kirchner, ' Neue Beob.,' p. 58 ; Schulz, ' Beitrage,' H, pp. 196, 

 222; Warnstorf, Verb. bot. Ver,, Berlin, xxxviii, 1896; MacLeod, Bot. Centralbl., 

 Cassel, xxix, 1887, Bot. Jaarb. Dodonaea, Ghent, iii, 1891, pp. 375-516.) In this 

 species the lower lip of the blue-violet corolla is wide and shallow, and bears a nectar- 



