JUNCACEAE 483 



fourth day it fades. The stigmas are pale-purple in colour, with long 

 papillae. 



2872. J. supinus Moench. — In this species intermittence is obvious. The 

 stigmas do not project from the perianth lobes. Anthesis lasts \-i\ days, and 

 the female stage for about 2 hours. The stigmas are pale-red in colour, with 

 very long transparent papillae. 



2873. J. Tenageia Ehrh. — No distinct intermittence can be observed in this 

 species. The stigmas do not project from the perianth. Anthesis lasts one day, 

 the female stage three or more hours. Cleistogamy probably occurs sometimes, but 

 phaenantherously. The stigmas are pale yellowish-white in colour with transparent 

 papillae. 



2874. J. tenuis Willd. — This species flowers distinctly intermittently. Anthesis 

 is extremely brief (from about 7-8 a.m. until 12 noon). The female stage lasts one 

 hour. The stigmas do not project from the perianth. 



2875. J. trifidius L. — This species is markedly protogynous, with a female 

 stage lasting two days ; the hermaphrodite one is probably of the same length. The 

 stigmas are greenish-white in colour, with long closely-set papillae. 



2876. J. valvatus Link. — This Portuguese species does not flower inter- 

 mittently, but continuously. The blossoms only open into the form of a funnel, and 

 are female the first day, hermaphrodite the second, and then female again with 

 a closed perianth for one or several days longer. The stigmas are white in colour 

 with transparent papillae. 



2877. J. triglumis L. — Kerner {tesle Buchenau, ' Monographia,' pp. 398-9) 

 describes this species as protogynous. Allogamy is possible in the first stage ; in 

 the second (hermaphrodite) one autogamy takes place by contact of the stigmas 

 and anthers. 



926. Luzula DC. 



2878. L. campestris DC, var. vulgaris Gaud. — There is no intermittence in 

 this species. Anthesis begins with the projection of the long, greenish-white stigmas 

 from the tip of the still-closed perianth. This female stage lasts one oi' several 

 days. Before the flower opens the stigmas almost always fade completely, and 

 a neuter stage, lasting several (4-7) days, follows, so that the perianth does not 

 open until 5-9 days after the projection of the stigmas. On the following (the 

 6th to the 9th) day the anthers dehisce, and the pollen is scattered about when 

 the flowers are shaken. The perianth is therefore open fully 36 hours, and 

 usually closes during the night following the 6th-9th day. Meehan (Proc. Acad. 

 Nat. ScL, Philadelphia (Pa.), 1868, p. 156) has already described the chief points, 

 which are also accurately given by Schulz ('Beitrage,' I, p. 102). 



2879. L. nigricans Desv. (=L. campestris DC, var. sudelica DC). (Schulz, 

 ' Beitrage,' I, p. 103.) — Schulz describes this species as less protogynous; most of 

 the stigmas fade only a little at the tip before the flower opens, but many remain quite 

 receptive. The anthers dehisce immediately after the flowers open, and as their tips 

 are at the same level as those of the perianth leaves, automatic self-pollination no 

 doubt almost always takes place. 



