177 
Order CIX. MARSILEACEjE. 
Genus 1. Pilularia. 
P. GLOBULIFERA. Pillwort. Fig* 1761. 
Rhizome creeping, slender, producing leaves and roots at regular in¬ 
tervals. Margins of lakes. 1-5 in. Perenn. May. E. B. 1.521. 
J5T. 2 ?. 2. 1458. H.fyArn.596. Bab. 4. 430, 5.431. S. 14. 
Order CX. LYCOPODI ACEiE. 
Genus 1. Isoetes. 
I. lacustris. Quillwort . F \£* 1^62. 
No persistent leaf-bases; larger spores bluntly tubercled. Aquatic. 
Bottom of lakes. 2-6 in. Perenn. July. E . B . 1. 1084. E . B . 2 . 
1457. H . fyArn . 596 . Bab . 4.430,5.432. S . 13. 
I echinospora. Fig. 1763> 
No persistent leaf-bases ; larger spores very acutely tubercled. Aquatic 
( Bab .). Bottom of pools. 1-4 in. Perenn. July. Bab . 5.4.32. 
I. Hystrix. K* 1764> 
Rhizome more or less covered by the persistent hardened leaf-bases. 
Terrestrial ( Bab .). Dampish sandy places. 1-2 in. Perenn. May, 
June. Bab . 5.432. 
Genus 2. Lycopodium. 
L. clavatum. Common Club - moss . 1765. 
Stem creeping, long; leaves scattered, incurved ; spikes 2-3, s _t al £ed. 
Heaths and high pastures. Perenn. July, Aug. E . B . 1. 224. E . B . 2 . 
1451. H . fyArn . 595 . Bab . 4.430, 5.432. S . 15. 
L. annotinum. Interrupted Club - moss . F ^>‘ 1766. 
Stem creeping, long; leaves spreading; spikes sessile, solitary, ter¬ 
minal. Stony mountains. Perenn. Aug. E . B . 1 . 172 , 7 . E . B .~. 
1452. H . fy Am . 595. Bab . 4 . 430, 5. 432. S . 16. 
L. alpinum. Savin-leaved Club - moss . . _ F ^>* 47 67. 
Stem creeping; leaves in four rows, imbricated; spikes sessile, 
terminal. High moorlands and mountains. 2-5 in. Fere “ n * 
E . B . 1.234. 2?. 2?. 2. 1455. H.fy Am . 595. Bab . 4. 431, 5. 432. 
S . 17. 
L. Selago. Fir Club - moss . F *f* 1768. 
Stem short, erect; leaves obscurely 8-rowed. Barren sandy heaths. 
2-9 in. Perenn. June-Aug. E . B . 1.233. E . B . 2. 14o6. H .^ Arn . 
595. Bab . 4. 431, 5. 433. S . 18. 
L. inundatum. Marsh Club - moss . F ^>* 4 .760* 
Stem creeping; leaves scattered, curved upwards; spikes terminal, 
sessile. Moist boggy heaths. 1-3 in. Perenn. Aug., Sepi. 
239. E . B . 2.1453. H . fy Am . 595. Bab . 4.431,5.433. S . 19. 
L. selaginoides. Lesser Alpine Club - moss . . Fig. 1770. 
Stem creeping, branched ; spikes solitary, sessile, terminal. Boggy 
ground. 2-4 in. Perenn. Aug. E . B . 1. 1148. E . B . 2. 14o4. 
H . Am . 595. Bab . 4. 431, 5. 433. S . 20. 
Z x 
