LILIACEAE 453 



886. Urginea Steinh. 



2760. U. Scilla Steinh. (=Scilla maritima L.). (Herm. Miiller, 'Weit. Beob.,' 

 I, P- 378.)- 



VisiTORS. — Herm. Miiller, jr., observed the following 10 bees, all skg., at Jena. — 



I. Arithophora aestivalis Pz. (= A. haworthana K.) t and 5, po-cltg, ; 2. An- 

 drena parvula K. 5; 3. Chalicodoma muraria Retz. S; 3. Eucera longicornis Z. 

 S and 5 ; 5. Halictus maculatus Sm. 5 ; 6. Melecta luctuosa Scop. S and S ; 7. Osmia 

 aenea Z. $ ; 8. O. aurulenta Pz. 5 and S ; 9. O. fusca Chr. ( = O. bicolor Schr.) ; 

 10. Sphecodes gibbus Z. }. 



887. Brodiaea Sm. 



2761. B. laxa S. Wats. (Borzi, ' Contrib. alia biol. veget.,' II, Fasc. 2, 

 pp. 3-4.) — Borzi describes the flowers of this species as protandrous. Nectar is 

 secreted at the base of the flower. 



Visitors. — Small po-cltg. bees (Halictus sp.). 



2762. B. Douglasii S. Wats. (Borzi, op. cit., p. 4.) — Borzi describes this 

 species as possessing a similar mechanism to B. laxa. 



2763. B. lutea Lindl. (Borzi, op. cit., pp. 4-6.) — Borzi states that in this 

 species there are two kinds of nectary in the same flower differing in position, 

 time of development, and origin, one being present in the male and the other in 

 the female stage. So far as our present knowledge goes this is a unique case. 



2764. B. multiflora Benth. (Borzi, op. cit., pp. 7-8.) — In this species the 

 narrow passage to the nectar secreted at the base of the flower leads between 

 the perianth wall and the ovary. The three inner stamens are modified into 

 three small, petaloid staminodes, alternating with the three fertile stamens, and 

 turning their concave sides to the middle of the flower. A mechanism is thus 

 formed which agrees largely with that of Asclepiads. 



2765. B. ixioides S. Wats. (Willis, 'Contrib. to the Nat. Hist, of the Flower,' 

 2.) — The flowers of this species are protandrous. 



Visitors. — Willis (Cambridge Botanic Garden) observed the beetle Meligethes, 

 Thrips, and flies. 



888. Brevoortia Wood. 



2766. B. Ida-Maia Wood. (Borzi, op. cit., pp. 8-9.) — This species possesses 

 a similar flower mechanism to that of Brodiaea ixioides. 



889. Stropholirion Torr. 



2767. S. californicum Torr. (Borzi, op. cit., p. 9.) — This species possesses 

 a similar flower mechanism to that of Brevoortia Ida-Maia, being only distinguished by 

 its shorter perianth tube. 



890. Allium L. 



Protandrous (rarely protogynous) flowers, usually aggregated into conspicuous 

 globular umbels ; the nectar is concealed, and Grassmann states that it is secreted 



