JUNCE&. 391 



SECTION 2. Perennial, usually creeping. Stems jointed (hollow and 

 septate) internally, joints rarely visible externally. Testa not produced. 



13. J. obtusiflo nis, Ehr. ; stein tall and leaves (few) erect terete, 

 cymes lateral or subterminal in very compound corymbs, branches zigzag, 

 perianth-segments obtuse equalling the ovoid mucronate capsule. 

 Marshy places, from Wig-ton and Haddington southwards ; very rare in 



Scotland and in S.E. Ireland; fl. July- Aug. liootstock widely creeping. 

 Stems not tufted, 2-3 ft. , usually stout, soft, hardly striate, sheathed at the 

 base. Leaves 1-2, like the stem, flowers in., sessile in dense peduncled 

 or sessile clusters of 3-8, pale ; bracts small, obtuse, scarious. DISTRIB. 

 Europe from Gothland southwards, except Greece Turkey and Russia, 

 N. Africa. 



14. J. articula'tus, L. ; stem slender and leaves slightly compressed, 

 cyme lateral or subterminal compound corymbose, perianth-segments 

 acuminate not exceeding the obovoid narrow acuminate capsule. 



Bogs, especially in mountain districts ; ascending to near 3,500 ft. in the 

 Highlands ; fl. June-Aug. Very variable in habit, size, robustness, amount 

 of foliage, and size and composition of the cyme ; the following sub-species 

 express its principal modifications. DISTRIB. Europe, N. Africa, N. and 

 W. Asia to the Himalaya. 



Sub-sp. ARTICULA'TUS proper ; tall, leaves very conspicuously jointed when 

 dry, flowers in dense distant sessile or peduncled clusters of 3-12 dark 

 chesnut, bracts acuminate -f as long as the flower, perianth-segments 

 equalling the narrow acuminate capsule. J. acutijlorus, Ehr. Ascends to 

 1,200 ft. in the Lake District. 



Sub-sp. SUPI'NCS, Mvunch (sp. ) ; rootstock sometimes tuberous, stems terete 

 3-10 in. often floating with flaccid straggling branches, joints very obscure, 

 leaves slender, cyme terminal, branches few long suberect, bracts scarious 

 acute sometimes equalling the flower, perianth-segments acute equalling 

 the ovoid obtuse mucronate capsule. Ascends to 3,400 ft. in the Highlands. 

 VAR. 1, uligino'sus, Sibth. (sp.) ; erect, stamens 3. VAR. 2, subverti- 

 cilla'tus, Wulf (sp.); decumbent or floating, stamens 3. VAR. 3, Koch'ii, 

 Bab. ; stamens 6, filaments longer, capsule retuse. J. wigritellus, Koch, not 

 Don. Devon and Galway. 



Sub-sp. LAMPROCAR'PUS, Lkr. ; stem slightly compressed stout or slender, and 

 leaves evidently jointed when dry, cyme terminal, branches long suberect, 

 perianth-segments shorter than the narrow beaked glossy capsule, inner 

 obtuse, stamens 6. Ascends to 2,400ft. in the Highlands; also found in 

 N. America. Of J. niaritelius, Don, not Koch (of the Clova Mts.), referred 

 to this by Syme, nothing satisfactory is known ; garden specimens in 

 Borrer's Herbarium from Forster (given to the latter by Don himself), have 

 compressed stems, and seem the same as Lamprocarpus. 

 SECTION 3. Annual. Stem hollow, jointed and septate within or not. 



Testa not produced. 



15. J. bufo'nius, L. ; tufted, very pale, stems slender jointed upper 

 part or cyme dichotomously branched, perianth -segments subulate-lan- 

 ceolate much longer than the obtuse mucronate capsule, stamens 6. 

 Moist places ; ascends to near 2,000 ft. in the Lake District ; fl. June Aug. 



Very variable, densely aggregated, from the seedlings growing in masses. 

 Stem 1-8 in., erect or ascending. Leaves few, setaceous, channelled above, 



