140 The Botanical Gazette. [April, 
handsome bright blue flowers. The corolla measures about 5™ 
and the lobes expand horizontally about 3.5". The tube is 
narrowed for about 17"", the bases of the filaments being 
attached to the tube for that distance. The free ends of the 
filaments bend inwards, holding the anthers in a cluster 
around the style. Bees insert their proboscides between the 
filaments, and these organs must be 17™ long to exhaust the 
nectar. The flowers are strongly proterandrous and are 
adapted to bumblebees. I have seen them visited by Bom- 
bus americanorum F. 3%. 
While the flowers of this plant are more conspicuous than 
those of G. Andrewsii, their pollen is not so well protected. 
Small bees and flies may enter the corollas and remove the 
pollen without being of any service, but this is prevented in 
G. Andrewsiz by the lobes remaining closed. 
On the literature of Gentian 
(1) Sprengel, Das eutaeckte fs cheanian 150-2. 1793. G. Pneu- 
enue, proterandry, etc.—(2) Axell, Om ano ordningarna for de faner- 
ogama vaxternas befruktning. so, G. lain 27, ref. (1): 
G. nivalis, lingulata, homogamous, etc., 101.—(3) Ricca, Osservazion! 
sulla fecondazione incrociata dei vegetali api ¢ subalpini tta della 
Soc. Ital. di Scienze —— 13: 254-63. 1870. 14: 245-64. 1871. 
acaulis, germanica, verna.—(4) Kerner, Schutzmittel = *Pollens 26, 
44. 1873.—(5) Miiller, Ratios tine der Blumen 332-3. 1873. G. Pet 
monanthe, Amarella, pollination. —(6) Beal, The fertilization of 
gentians by humblebees. Am. Nat. 8: Ser Ph 1874.—(7) Meehan, Fertil- 
. fe) 
pino, Ulteriori osservazioni Pt. II. 2: 162, 173, 180. ee G. acau- 
lis, Aap ait Loris pannonica, nectar receptacle and guides, proter- 
andry —-(9 ock, British wild flowers in relation. to insects, 29, 
e€ 
Andrewsii. Am. Nat. 9: 310. 1875.--(11) Kerner, Die Schutzmittel der 
Bliithen gegen sabetsicne: Gaste. Festschrift Zool.-Bot. Gesellsch. 
Wien. 1876. Several spp.—(12) Henslow, On the self-fertilization of 
plants. Trans. Linn. Soc. II. Bot. 1: 32 26. 1877. Self- pollination a 
5: 317-1 3-5. f. 94-115. 1877. Several spp.—(14) Miller, ‘Ge 
Schibcktlicte Dicidactand der Gattun fe Aa Kosmos 1: 162-3- 
1877. Avbeteagt of eres 5) Miiller, Fertilization of flowers te insects, 
Nature 16: 265. . Bavarica, verna, visits of moe Tt ee 
7: 
