COMPOSITAE 



575 



1316. A. alpina Bluff et Fing (=A. viridis Cass., and Cacalia alpina Z.). 

 (Herm. Muller, ' Alpenblumen,' pp. 450-2.) — As in Eupatorium cannabinum, each 

 head in this species contains only 4-5 florets ; the corolla consists of a tube 

 about 3 mm. long, with a slightly longer bell. When the two stylar branches 

 diverge they often rupture the anther-cylinder, and ultimately bend back so far 

 that the stigmatic papillae touch the sweeping-hairs, so that if any pollen-grains 

 still cling to these automatic self-pollination may be effected. 



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

 stated. — 



Herm. Muller (Alps), chiefly Lepidoptera (21), less frequently beetles (14) and 

 Hymenoptera (4). Schletterer and von Dalla Torre (Tyrol) record the humble-bee 

 Bombus terrester. 



1317. A. albida Cass. ( = A. albifrons Reichb.). (Herm. Muller, ' Alpenblumen,' 

 p. 452.) — Kerner states that there are no sweeping-hairs in this species, so that the 

 pollen is pressed out by 

 the ends of the stylar 

 branches. WL . ,1 , ^^j- ,/, 



Visitors. — The fol- 

 lowing were recorded by 

 the observers, and for the 

 localities stated. — 



Herm. Muller (Alps), 

 only Diptera (Echino- 

 myia andEristalis), though 

 probably the chief visitors 

 are Lepidoptera as in 

 the last species. Loew 

 (Altvatergebirge), a Chry- 

 somelid (Chrysomela ca- 



Caliae 6'f^r., subsp. sene- fig. 193. Homofyue a!pina, Cass. (siheT HeTm. UHWeT). .,4. Disk - 



Cionis Schumm), and a floreti,, the first (male) stage; pappus omitted A Ditto in the second 



'' female) stage. C. D, E. Ray.florets with reduced corolla limb and long 



Pyralid (undetermined sp., protruding style, 

 skg.). 



1318. A. hybrida DC. (=A. candidissima Cass.). (Herm. Muller, 'Alpen- 

 blumen,' p. 452.) — 



Visitors. — Herm. Muller only observed the hover-fly Eristalis tenax Z., skg. 

 and po-dvg. 



415. Homogyne Cass. 



Gynomonoecious, wilh protandious hermaphrodite florets, many of which are 

 aggregated into a head. Ray-florets female, filiform; disk-florets hermaphrodite, 

 tubular. Stylar branches of the latter beset with sweeping -hairs externally, and 

 stigmatic papillae internally. Flower class SL. 



1319. H. alpina Cass. ( = Tussilago alpina Z.). (Herm. Muller, 'Alpenblumen,' 

 pp. 452-4 ; Ricca, Atti Soc. ital. so. nat., Milano, xiii, 1870; Kerner, ' Nat. Hist. PI.,' 



