428 
90. JUXCACE.E. 
17. J. alpinus (Vill.); st. 2 — S-leaved erect almost tercfe, 1. -sheaths with acute 
dorsal angle, pan. compound with nearly erect branche.s, per.-segm. equal o?fuse 
the outer 3 mucronate, fr. oblong-ovoiil mucTonate. — R. ix. 403. — Resembling 
Sp. 16 but smaller and more slender, internal transverse divisions of 1. less 
apparent, pan. -branches more erect and slender, fl. fewer (2 — 5), per.-segm. 
broader with narrow scarious margin, caps, shorter and blunter.— Mountain 
bogs. P. VII. Via. 
18. ./. nigritel'lus (D. Don) ' : 3 — 4-Ieaved st. and internally 
jointed /. nearly cylindrical, panicle slightly compound ersct, 
sheaths dorsally acute, ^je?\-scj/??i. nearly equal (3 inner rather 
longer and broader) all acute falling short of the linear-oblong 
trigonous beaked (black) capsule. — E. B. S. 2643 (1830), not of 
Koch. — St. erect, 6 — 12 in. high. L. scarcely compressed. 
Clusters of more fl. than in Sp. 16. Caps, brown, at length 
black and glossy, more abruptly pointed than in J. artic- 
■ulatm. — Boggj- places in the north, and Wells, Norf. P. 
VII. VIII. E. S. I. 
19. J. bulhostts (L.) ; st. filiform, 1. setaceous slightly 
channelled faintly jointed internally, i^anicle nearly simple 
irregular long with few distant clusters, per.-segm. equal acute 
(3 inner rather blunt) nearly equalling the oblong very blunt 
m ucronate (pale brown) capsule, anth. as long as their filaments. 
— E. B. 801. R. ix. 397. J. supinus (Moench). J. idiginosti-f 
and ./. sub verticil I at us Sm. — Extremely variable in size and 
the direction of its stems, sometimes erect, at others prostrate 
and rooting at every joint, or [J. fluitavs (Lam.)] floating. 
Fl. often viviparous. Stam.- 3 or 6. — jS. Kochii ; caps, shorter, 
stam. 6, filaments nearly twice as long as the elliptic anthers. 
./. nigritellus Koch (1837). St. 78. 2. — Boggy and wet places. 
/3. Ivy Bridge, Devon (in .a bog). Connemara, Galway. P. 
VI.— VIII. E. S. I. 
+++ Flowers solitary, remote, or corymbose and forming a 
terminal panicle. Seeds not appendaged. 
20. J. squarr(kus (L.) ; st. leafless simple, 1. linear channelled 
radical, panicle terminal compound with cymose branches, ;>er.- 
segm. ovate- lanceolate acute ov bluntish equalling the obovate 
blunt mucronate capsule, anth. 4 times as long as their filaments. 
—E. B. 933. St. 36. 11. R. ix. 400.— St. erect, 6—12 in. high. 
L. many, somewhat spreading, rigid, half as long as the stem. 
Caps, pale brown, shining.— ^Vet heaths and moors. P. VI. VII. 
E.S.I. 
1 Buclienau considers this an alpine form of Sp. 10. — U. A; J. G. 
