437 



CXVII. MAESILEACEJi]. 



941. MARSILEA. 



1 . quadrifolia. L. in fours, on long sialics. 

 Lts. entire on the margin. Fr. stalked, p. 

 7-9. Wet. Fr. Rhine. Salzb. Carin. Cam. 



3. pubescens. L. in fours. Lts. quite 

 entire, pubescent. Fruit sessile, p. lapygia. 



943. PILULARIA. 



1. globulifera. Elongated, creeping. L. 

 setaceous. Fr. globose, about the size of a 

 pea. p. 8. Shallow water, occ. 



943. SALVINIA. 



1. natans. L. ovato- cordate, rough be- 

 neath with bundles of hairs. Fruit clustered. 

 6-8. Stagnant. Lubeck. Silesia. Baden. 

 s. Europe. 



944. ISOETES. 



1. lacustris. L. subulate, semiterete, of 

 4 longitudinal jointed tubes, p. 7-9. Bot- 

 toms of lakes. 



CXVIIl. LYCOPODIACEiE. 



945. LYCOPODIUM. 



A. All the Capsules %-valved. Seeds loose, 

 rounded. 

 1. clavatum. L. scattered, ending in a 

 filament. Spikes 3 or 3 together on a strigose 

 stalk. Scales ovato-triangular, finely lacerato- 

 dentate. p. 7, 8. Heathy hills. 



3. Chamsecyparissias. L. in 2 oppo- 

 site rows, with additional, nearly equal L. above 

 and below the stem. Spikes 2-6 on a length- 

 ened stalk. Bracts broadly ovate, eroso-cre- 

 nulate. p. 7, 8. Woods and heaths on a 

 barren soil. G. Vosges. 



3. complanatuna. L. connate at base in 

 3 rows, with a detached row above and below ; 

 the latter very small. Spikes 3-6, on a length- 

 ened stalk. Bracts broadly ovate, cuspidate, 

 eroso-crenulate. p. 7, 8. Woody hills. Paris? 

 Rhine. Alps. Boh. 



4. alpinum. L. in 4 rows, acute, keeled, 

 entire. Branches fastigiate, erect. Spike ses- 

 sile, terminal. Bracts broadly ovate, acumi- 

 nate, denticulate, p. 8. Mountains. 



5. annotinum. L. scattered, lanceolate, 

 cuspidate, serrate. Flowering-branches with 



yearly rings. Spikes sessile, solitary, terminal. 

 Bracts broadly ovate, cuspidate, eroso-denticu- 

 late. p. 8. Mountains . So. Dan. G. 



6. Sela^o. L. in 8 rows, uniform, lan- 

 ceolate. Stem dichotomous, erect, fastigiate. 

 Caps, in the aiils of L. p. 6-8. Heathy 

 hills. 



7. inundatum. L. scattered, linear, acute. 

 Stems close to the ground, rooting. Spikes 

 stalked, erect, solitary. Bracts like L., but 

 somewhat dilated at base. p. 8. Boggy heaths. 



B. Capsule A-valved. Seeds 3 or 4, angular, 

 fixed. 



8. selaginoides. L. scattered, lanceo- 

 late, ciliate. Stem procumbent, rooting. Spikes 

 terminal, solitary, erect. Floral L. larger, p. 8. 

 Moist mountain heatlis. 



9. helveticum. L. in 4 rows, oval, sub- 

 acute : two larger spreading ; two smaller ad- 

 pressed. Stem rooting. Bracts and L. of 

 branches similar, acute, p. ? Shade. Alps. 



10. denticulatum. L. somewhat 4- 

 rowed, oval, acutely mucronate : two larger 

 spreading; two smaller adpressed. Stem 

 rooting. Bracts finely acuminate, a. ? s. Fr. It. 



3 I i 



