48 102. LYCOPODIUM. § 2. RHOPALOSTACHYS. a*. CERNUA. 



Shoots erect, or subscandent in the longest forms, springing from a wide- 

 trailing hypogeous rhizome, 10 — 250 cm. long, the lower part simple, the 

 upper part more or less copiously branched, the stem and rachises naked 

 or pubescent, foliate; branches short or elongated, mostly copiously 

 branched again, bi- or plurifarious, ascending, the lowest not rarely 

 elongated, nutant, and proliferous at the apex; ultimate branchlets 2—5 

 mm. diam. including the leaves. Leaves more or less crowded, linear- 

 subulate, 2 — 3 mm. long, rather terete, often angular and grooved when 

 dry, entire, arcuate-ascending, subsigmoidal (') or uncinate C^). Spikes 

 sessile at the end of the branchlets, cylindrical, oviform or ellipsoidal, 

 sometimes subglobose, 3 — 20 mm. long, 2 — 3 mm. diam. ; sporophylla 

 crowded, erect, or somewhat spreading in age, sharply long-acuminate to 

 subcuspidate from a rather broadly ovate base, copiously fimbriate-ciliate. 

 — Very variable. 



Forma typica: Leaves Arm, not capillary, all subsigmoidal, rather 

 approximate; spikes cernuous. 



Forma erecta: Like the type, but the .spikes erect. 



War. capillaceum: Leaves flaccid, nearly capillary, subsigmoidal, 

 rather loose, those of the stem and main rachis rather horizontal. 



War. salakenfiie: Leaves flaccid, iine, rather loose, uncinate, of 

 stem and main rachis erected, adpressed; ultimate branchlets very slender, 

 to 2 mm. diam., loose, erecto-patent ; spikes slender, I'A mm. diam. 



War. crassifolium : Leaves rigid, thick, those of the ultimate 

 branchlets rather crowded, conspicuously uncinate; ultimate branchlets 

 ascending; spikes rather thick, 2—3 mm. diam. — Two forms: Leaves 

 of the stem and main rachis squarrose (forma squarrosa); leaves of the 

 stem and occasionally those of the main rachis erected, adpressed (forma 

 appressa). 



War. iieiiduliini: Like the preceding, but the ultimate branchlets 

 nutant or pendulous. 



Tropical and extra-tropical. 



(43) li. curvatnm, Stc, Rac, Flor. Btz., I, 243; L. vulcanicum, 

 BL, Enum., 266; L. cernuum, L., var. curvatum, Bk., Fern All., 23. 



Like the preceding but more robust, the branchlets stouter, the 



(') Nearly S-shaped, the apex outward bant, 

 (') Nearly )-shaped, the apex inward bent. 



