374 CLUB-MOSS FAMILY. 



* Stems trailing, sending out rootlets nearly up to the end. 

 *- Branclilets only 1" broad: leaves wide apart in. each row. 



S. delicatissima. Stems 4' - 8' long, irregularly forked and branched ; 

 branches rather distant ; leaves oblong-roundish, obtuse, with a few slender 

 cilia towards the base ; intermediate ones ovate, pointed. 



*- - Branchiets 2'' - 3" broad, their Itavt-.s closely placed in each row. "* 



S. Kraussiana. (LYCOPODIUM DENTICULA.TUM of the florists.) Stems 

 very long, articulated below each branch ; branches distant, bearing a few short 

 forked branchlcts ; leaves bright green, the larger ones oblonir-ovate, acute, 

 rounded on the upper side, nearly straight on the lower, minutely denticulate ; 

 smaller ones with longer often rcflexed points. 



S. uncinata. (Lvc. CESIUM of florists.) Stems very long, not articu- 

 lated, freely branched ; branches 2 - 3-pinnatc with short crowded branclilets ; 

 leaves when living with a steel-blue iridescence, fading to green when dried, very 

 closely placed, larger ones oblong, equal-sided, obtuse, entire ; smaller ones 

 ovate with slender incurved points. 



# * Stem ascending, only the lou'er part bearing long rootlets. 



S. Martensii. (Lvc. STOLONfFERUM of florists.) Stems 6' -10' long, 



much branched fr.>m the base ; branches bipinnate, with copious branclilets 



2'' 3" or even 4" wide ; larger leaves crowded, obliquelv ovate, the upper side 



broadest, obtuse, entire ; smaller ones ovate with a slender often recurved point. 



# # # Stems erect, or nearly so, rooting only at the very base. 



S. er^thropUS. Stalk 2' - 6' high, bright red, having a few closely ap- 

 prcssed red leaver, and bearing at the top a broad frond-like stem pinnately or 

 pedatcly divided into a few 2-3 times pinnate branches, with very numerous 

 extremely crowded branch'cts 1" - 1 j" wide; leaves closely imbricated, obliquely 

 ovate-oblong, curved upward, rather obtuse, ciliate; smaller ones ovate, with 

 long straight points. 



S. Braiinii. (Lvc. WiLLDEN6vn of florists.) Stalk straw-color or pale 

 red, shorter than in the last, finely pubescent, as are the branches ; frond-like 

 stems long-ovate, 4 times pinnate, resembling an elegant fern ; branclilets not 

 crowded, about 1" wide; leaves scarcely imbricated, ovate, obtuse, entire; 

 smaller ones with straight points. 



* * * * Stems in a dense nest-like tuft, not rooting : branches often curling u/> 



when dry. 



S. CUSpidata. (Lvc. CIRCIN\LK of florists.) Frond-like stems 6'- 8' 

 long, green above, paler beneath, oblong or lyre-shaped, loosely 3-pinnatc ; 

 branchlcts 1" wide ; leaves obliquely tiangular-ovate, wiih lonir often incurved 

 bristle-points, having a narrow whitish margin, sparingly ciliated and minutely 

 denticulate ; smaller ones obliquely ovate, with long slender points. 



S. lepidoph^ila, from Lower California, &c., is the "Bird's Nest Moss," 

 or " Rcsurrec ion-Plant." It is a nest-like b:ill when dry, but when moist it un- 

 folds and displays the densely 2 -3-pinnate elegant fern-like branches radiating 

 from a coiled-up central stem ; the leaves white-margined, closely imbricated, 

 round-ovate, obtuse. Nearly 30 species are cultivated in Great Britain, besides 

 those here described. 



3. ISOETES, QUILL WORT. (Name from the Greek words for fqual and 



year, meaning that ilui plant is the s )in<- at all seasons.) Tlu- species demand 



too nice discrimination for the beginner, and must bj studied by aid of the 



Manual. 



I. lacustris, rather rare only N., and the far commoner 



I. 6Chin6spora, are the principal northern species, living under water. 



I. riparia mid I. Engelmanni, with leaves 4' -20' long, live partly 



out of wtiter, at least for a p-irt of the summer. 



I. melan6poda, only W., lives in shallow ponds or pools which dry up in 



