LES. LYC.] 



PLANTS. 



125 



to the middle, decurrent to the rachis , 

 primary nerve thin, dichotomous; 

 lower pairs of lateral veins emerging 

 from the rachis, the other alternately 

 from the midrib, forking twice, the upper 

 forking once or simple. Type L. moorii. 



adiantites, Lesquereux, 1854, (Neurop- 

 teris adiantites,) Bost. Jour. Nat. Hist., 

 vol. 6, p. 419, and Coal Flora of Pa., p. 

 163, Coal Meas. 



moorii, Lesquereux, 1858, (Neuropteris 

 moori,) Geo. Sur. Pa., vol 2, p. 860, Coal 

 Meas. 



LESLEYA, LesqUereux, 1880, Coal Flora of 

 Pa., p. 142. [Ety. proper name.] Pin- 

 nai simple, very entire, sublanceolate, 

 gradually narrowing toward the base, 

 traversed by a thick costa effaced un- 

 der the apex; veins oblique, curved, 

 equal, repeatedly dichotomous. Type 

 L. grandis. 



grandis, Lesquereux, 1880, Coal Flora of 

 Pa., p. 143, Coal Meas. 



microphylla, Lesquereux, 1884, Coal Flora 

 of Pa., p. 831, Coal Meas. 



FIG. 49. Llcrophycus ottawense. 



LICROPHYCUS, Billings, 1862, Pal. Foss., vol. 

 1, p. 99. [Ety. lihros, a fan ; phykos, 

 sea-weed.] Composed of numerous, 

 elongated, subcylindrical stems, radiat- 

 ing from a common root, and remain- 

 ing single, or branching at an acute 

 angle. Type L. ottawense. 

 flabellum, Miller & Dyer, 1878, Jour. Cin. 

 Soc. Nat. Hist., vol. 1, p. 25, Hud. 

 Riv. Gr. 



formosum, Billings, 1866, Catal. Sil. Foss. 



Antic., p. 72, Hud. Riv. Gr. 

 hiltonense, Billings, 1862, Pal. Foss., vol. 



1, p. 101, Black Riv. and Trenton Gr. 

 hudsonicum, Billings, 1862, Pal. Foss., vol. 



1, p. 101, Hud. Riv. Gr. 

 minor, Billings, 1862, Pal. Foss., vol. 1, 



p. 100, Trenton Gr. 

 ottawense, Billings, 1862, Pal. Foss., vol. 



1, p. 99, Trenton Gr. 

 robustum, Billings, 1866, Catal. Sil. Foss. 



Antic., p. 72, Hud. Riv. Gr. 

 vagans, Billings, 1866, Catal. Sil. Foss. 



Antic., p. 72, Hud. Riv. Gr. 

 ; Lithodictuon becki, Conrad. Not properly 



defined ; but see Dictyophyton becki. 

 ! LONCHOPTKRIS, Brongniart, 1828, Prodr. Hist. 

 Veg. Foss., p. 59. [Ety. lonche, spear ; 

 pteris, fern.] Pinnate or bipinnate; 

 pinnules contiguous at the base, nearly 

 at right angles to petiole, oblong-elon- 

 gate, obtuse, middle-sized veins reticu- 

 lated with finer ones. Type L. bricei. 

 tenuis, Dawson, 1863, Can. Nat. and Geol., 

 vol. 8, and Acad. Geol., p. 483, Coal 



Meas. 

 Lycopodiolithes elegans, see Lepidoden- 



dron elegans. 



LYCOPODITES, Brongniart, 1822, Mem. du 

 Mus. d'Hist. Nat. de Paris, and Ly- 

 copodiolithis of Schlotheim and 

 Sternberg. [Ety. from Lycopodium, 

 the club moss.] Plants herbaceous ; 

 leaves of the same or of two differ- 

 ent forms upon the same branches, 

 distichous or in spiral order; fruc- 

 tifications in small cylindrical spikes. 

 Type L. pinniformis. 

 annulariifolins, Lesquereux, 1870, 

 Geo. Sur. 111., vol. 4, p. 426, Coal 

 Meas. 

 arborescens, Lesquereux, 1884, Coal 



Flora of Pa., p. 778, Coal Meas. 

 asterophyllitifolius. Lesquereux, 1866, 

 Geo. Sur. 111., vol. 2, p. 447, Coal 

 Meas. 

 cavifolius, Lesquereux, 1861, Geo. Sur. 



Ky., vol. 4, p. 437, Coal Meas. 

 comosus, Dawson, 1863, Quar. Jour. 

 Geo. Soc., vol. 19, p. 462, Devo- 

 nian, 

 flexifolius, Lesquereux, 1884, Coal 



Flora of Pa., p. 779, Coal Meas. 

 lacoei, Lesquereux, , 



1884, Coal Flora of 

 Pa., p. 780, Coal 

 Meas. 



matthewi, Dawson, 

 1861, Can. Nat. and 

 Geo., vol. 6, p. 171, and 

 Acad. Geol., p. 540, De- <& 



vonian. . FIG. 50.-Lyco- 



meeki, Lesquereux, 18/0, podites mat- 

 Geo. Sur. 111., vol. 4, p. hwi; a, branch 

 426, Coal Meas. iind 'f^es.*'^ 



ortoni, Lesquerenx, 1880, 



Coal Flora of Pa., p. 357, Coal Meas. 

 pendulus, Lesqueieux, 1880, Coal Flora 

 of Pa., p. 357, Coal Meas. 



