62 a. BRjiirv 



dimorpha, intermedia parallela vel subconvergentia, adpressa, mucrone 

 palulo. Nervus foliorum omnium sub apice evanescens. Margo singula (in 

 foliis intermediis versus basin duplici) cellularum série formalur. Micro- 

 sporœ aurantiacse, ^mra. crassa3, sparsimelongato-papillosa3, papillis 

 cylindricis, obtusis vel truncatis, -~ mm. fere longis. Macrosporse albœ, 

 diamètre \ mm. vix superantes, tenuissime et inconspicue farinaceo- 

 exasperatse. 



Cl. de Schlechtendal et de Chamisso (Linnsea, V, p. 6*22), quos cl. 

 Spring secutus est, cum 5. serpente speciem distinctissimam mexicanam, 

 a peregrinatoribus Schiede et Beppe prope Papantlam lectam, commis- 

 cuerunt, quarn Selag. Schiedeanœ nomine distinguo. Surculis gaudet 

 prostratis , longe repentibus, passim sequaliter dichotomis, caeterum 

 remote alternatim ramosis, ramis ineequaliter dichotomis, cuneatim expan- 

 sis. Caulis debilis, tetragonus, pleurotropus, superne utrinque sulco 

 angusto laterali exaratus el medio leviter depressus, subtus quoque late 

 exaratus. Radiées tenues. Folia undique dimorpha, remotiuscula, in 

 ramulis magis approximata, sed tamen discreta, lateralia subrectangule 

 patentia, oblongo-lanceolata, subœquilatera, obtusiuscula, utroque mar- 

 gine ultra médium remote ciliala, ciliis marginis anterioris in statu sicco 

 ad paginam folii supinam reflexis, versus apicem minutissime serrulata, 

 basi caulis dorsum non tegentia, longitudinaliter inserta, contracta, 

 postice magis dilatata, sed non auriculata, inconspicue marginata, nervo 

 supra prominulo, subtus leviter impresso, sub apice evanescente instructa. 

 Folia intermedia 3-Ziplo minora, subconvergentia, adpressa, apice sub- 

 patula, ovato-oblonga, subfalcala, longe cuspidata, marginata, parce et 

 remote ciliata, basi obliqua, exterius subauriculatim producta, dorso 

 leviter carinata. Spica3 ramulos terminantes, brevissimaa, ramofolioso vix 

 angustiores. Bracteas subdimorphœ ! \ inferiores paululum minores et 

 pallidiores, ex ovato sensim acutatse ciliolatae. 



S. serpenti affinis et quoad habitum valde similis est Sel. cordifolia 

 Spr., /. c, p. 103 (Lijcop. cordifolium Desv.), qua3 in hortis nostris de- 

 sicleratur. Foliis lateralibus et intermediis cuspidato-acuminatis facile 

 distinguitur. Gaule primario in sarmentum fdiforme microphyllum excur- 

 rente ad sequentem quoque accedit. 



40. S. ;;armentosa A. Br.;? S. patula Spr. monogr. II, 

 p. 96; ? Lycopodium patulum Sw. syn. Fil. p. 184 et 411 ; 

 L. heterodonton Desv . 



Prostrata, surculis longe repentibus, laxe pinnatim vel bipin- 



