36 Rhodora [February 



are densely many-flowered, the perianth-segments awl-pointed, 

 equalling or slightly shorter than the abruptly short-pointed capsules ; 

 and the seeds are i to 1.8 mm. long. /. brevicaudatus is a slender 

 plant with the inflorescence elongate, strict, and narrow, three to six 

 times longer than broad ; the glomerules are 3-7-flowered, the outer 

 perianth-segments (sepals) acute, but scarcely awl-pointed, the inner 

 (petals) acute or ohtusish, and much shorter than the prismatic 

 gradually pointed capsules ; and the seeds are very rarely more than 

 I mm. long. Furthermore J. canadensis, which occurs in marshes, 

 swampy meadows, and on wet shores, is commonest on the coastal 

 plain from southern Newfoundland to Louisiana, and on the upper 

 St. Lawrence and the Great Lakes, though it is occasionally found 

 at other inland stations. Its average fruiting season is in early Sep- 

 tember, fruited (but not over ripe) material from 40 stations showing 

 a range from August 12 to October 8 with an average of September 

 9. /. brevicaudatus, on the other hand, abounds in damp open soil, 

 roadsides, ditches, wet rocks, shores, etc., from Newfoundland to the 

 upper Saguenay, west to Minnesota, and south, mostly in cold bogs, 

 to the mountains of Pennsylvania. Its fruiting season is four weeks 

 earlier in the same region than that of /. canadensis^ mature speci- 

 mens from 54 stations showing a range from July 16 to September 9, 

 with an average of August 12. In view of these marked differences 

 the writer feels justified in treating the strict northern plant as 

 a distinct species. 



/uncus effusus, var. compactus, Lejeune iV Courtois, Compend. Fl. 

 Helg. ii. (1831) 23, wath inflorescence glomerulate, has passed in 

 America as /. effusus, var. conglomeratus, Meyer (/. conglomeratus, 

 L. /. Leersii, Marsson) which is a distinct species of Europe, known 

 also in America from Newfoundland and Nova Scotia. /. effusus^ 

 var. contractus, is the common form of the species in Cape Breton and 

 Nova Scotia proper and occurs frequently in eastern Maine, but is 

 apjiarently unusual southward. 



JuNCUs (PoioPHVi.Li) oronensis. Perennis dense caespitosus. 

 Caules erecti stricti pallide straminei vel flavo-virides 3-6 dm. alti. 

 Folia basilaria ; vagina pallide fusca vel rosea; auriculae membran- 

 aceae vel fere scariosae ; lamina gracillima firma valde involuta 1-2 

 dm. longa. Inflorescentia sul)dichotoma 2.5 9 cm. longa 1-4 cm. 

 diametro; rami stricti suberecti, flores plerumque secundi distincte 

 distantes vel rarius approximati et umbellulati. Bractea erecta 

 inflorescentiam multo superans. Flores 4-5 mm. longi pallide 

 straminei. Tepala lanceolato-subulata marginibus angustis membra- 

 naceis vel omnia subaequilonga vel tria interna pauUo breviora. 

 Stamina 6 tepalis ^ breviora ; filamenta linearia ; antherae lineares 

 filamenta aequantes. Fructus tepalis brevior oblongus trigonus trun- 

 cato-emarginatus lateribus planis vel prope apicem paullo concavis ; 



