398 JUNCACEZ. 
species. The genus is very commonly represented in nearly all temperate and frigid 
regions; it is also found within the tropics, and some of the species are generally 
dispersed. 
1. Juncus acuminatus, Michx. Fl. Bor.-Am. i. p.192; Engelm. in Trans. Acad. 
Sc. St. Louis, ii. p. 462 (varietates plures); Buchenau, Krit. Verzeichn. Junc. p. 2; 
S. Wats. in Proc. Am. Acad. Sc. xviii. p. 169; A. Gr. Man. Bot. Northern U.S. ed. 5, 
p. 041. 
Juncus radicans, Schl. in Linnea, xviii. p. 442, fide Buchenau in Abhandl. Naturw. Ver. Bremen, 
1878, iii. p. 343, et Krit. Verzeichn. Junc. p. 38. . 
Juncus debilis, A. Gr. Man. Bot. Northern U.S. ed. 2, 1856, p. 480. 
New Jersey southward.—NortH Mexico, Sonora (Schott), region of San Luis Potosi, 
6000 to 8000 feet (Parry & Palmer, 893, 895); Soura Mexico, Vera Cruz to Orizaba 
(Miller, 1955), Jalapa (Linden, 84, 86), without locality (Bates). Hb. Kew. 
2. Juncus balticus, Willd. Berl. Magaz. 1809, iii. p. 298; Buchenau, Krit. 
Verzeichn. Junc. pp. 7 et 617; Engelm. in Trans. Acad. Sc. St. Louis, ii. p. 462, pro 
parte; S. Wats. in Proc. Am. Acad. Sc. xviii. p. 167. 
New Eneanp southward and westward.—Nortu Mexico, Sonora (Wright), San Luis 
Potosi (Schaffner); South Mexico, Tacubaya (Bourgeau, 207).—NortHERN EvRopre. 
Hb. Kew. 
3. Juncus brevifolius, Liebm. in Vidensk. Meddel. 1850, p. 40; Steud. Syn. Pl. 
Glum. ii. p. 298; Buchenau, Krit. Verzeichn. p. 8, et in Abhandl. Naturw. Ver. Bremen, 
1873, iii. p. 340. 
Sout Mexico, Chinantla, Puebla at 7000 feet (Leebmann). Hb. Kew. 
4, Juncus bufonius, Linn. Sp. Pl. ed. 1, p. 328; Engelm. in Trans. Acad. Sc. 
St. Louis, ii. p. 451; S. Wats. in Proc. Am. Acad. Sc. xvii. p. 168. 
Nort Mexico, Sonora (Thurber), San Luis Potosi (Schaffner, 556; Parry & Palmer, 
896). 
Very widely dispersed, though often existing only as a colonist. 
5. Juncus effusus, Linn. Sp. Pl. ed. 1, p. 326; Engelm. in Trans. Acad. Sc. 
St. Louis, ii. pp. 443 et 491; Buchenau, Krit. Verzeichn. pp. 17 et 96; A. Gr. Man. Bot. 
Northern U.S. ed. 5, p. 537. 
Juncus communis, E. Mey. Junci Gen. Monogr. Specim. 1819, p. 20. 
Juncus conglomeratus, Linn. Sp. Pl. ed. 1, p. 326. 
Mexico, Misantla and Chinantla (Liebmann), region of Orizaba (Bourgeau, 2592), 
near Regla at 6500 feet (Galeotti, 5817), Vera Cruz to Orizaba (Miller, 1953). Hb. 
Kew. 
This species is almost ubiquitous. 
