130 



PLANTS. 



[OLI. PAL. 



Fio. 57. Odontopteris 

 schlotheimi. 



reichiana, Lesquereux, 1884, Coal Flora of 



Pa., p. 831, Coal Meas. 

 rotundifolia, Wood, 1866, Trans. Am. 



Phil. Soc., vol. 13, p. 348, Coal Meas. 

 scMotheimi, Brongniart, 1828, Hist. d.Veg. 

 Foss., p. 256, and Coal Flora of Pa., p. 

 136, Coal Meas. 



sphenopte r o i d e s , 

 Lesquereux, 1880, 

 Coal Flora of Pa., 

 p. 139, Coal Meas. 

 squamosa, Lesque- 

 reux, 1854, Bost. 

 Jour. Nat. Hist., 

 vol. 6, p. 419, and 

 Geo. Sur. Pa., 

 vol. 2, p. 860, 

 Coal Meas. 

 squamosa, Dawson, 

 1881, Quar. Jour. 

 Geo. Soc. Lond., 

 vol. 37, p. 305, 

 Devonian. The 

 name was pre- 

 occupied. See 0. 

 dawsonana. 

 subcrenulata, Lesquereux, 1880, Coal 



Flora of Pa., p. 137, Coal Meas. 

 subcuneata, Bunbury, 1847, Quar. Geo. 

 Jour., vol. 3, p. 427, and Coal Flora of 

 Pa., p. 134, Coal Meas. 

 tenuinervis, Lesquereux, 1858, (Neurop- 

 teris tenuinervis,) Geo. Sur. Pa., vol. 2, 

 p. 859, Coal Meas. 

 wortheni, Lesquereux, 1866, Geo. Sur. 111., 



vol. 2, p. 432, Coal Meas. 

 OLIGOCARPIA, Gceppert, 1841-48, DieGattun- 

 gen der fossilen Pflanzen, p. 3. [Ety. 

 oligos, few ; karpos, fruit.] Fronds bi- 

 pinnate or tripinnatifid ; primary pinnae 

 oblong-lanceolate; secondary divisions, 

 open, linear, pinnately divided in oblong 

 or half round lobes or leaflets, connate 

 at the base, crenulate ; primary and 

 secondary veins nearly of the same size, 

 thin but distinct ; lateral veins curved 

 to the borders, simple or forked. Type 

 O. gutbieri. 



alabamensis, Lesquereux, 1875, Geo. Eep. 

 Ala., p. 76, and Coal Flora of Pa., p. 

 266, Coal Meas. 



flagellarie, Lesquereux, 1858, (Sphenop- 

 teris flagellaris,) Geo. Sur. Pa., vol. 2, 

 p. 862, Coal Meas. 

 gutbieri, Goeppert, 1841-48, Die Gattungen 



der fossilen Pflanzen, p. 3, Coal Meas. 

 ORMOXYLON, Dawson, 1871, Foss. Plants Can- 

 ada, p. 14. [Ety. ormos, a chain, a cord ; 

 xylon, wood.] Woody stems, with cells 

 of the character of those of Dadoxylon, 

 very thick walled, with three rows of 

 hexagonal areolee, having oval pores 

 and medullary rays of one row of cells. 

 Pith cavity composed of a series of 

 spherical chambers, separated by thick, 

 transverse cellular partitions. Type 0. 

 erianum. 



erianum, Dawson, 1871, Foss. Plants Can- 

 ada, p. 14, Portage Gr. 



ORTHOGONIOPTERIS, Andrews, 1875, Ohio 

 Pal., vol. 2, p. 418. [Ety. orthogoniopteris, 

 rectangular-fern.] Frond simply pin- 

 nate; pinnules alternate, lanceolate or 

 oblong-linear, rounded and tapering to 

 an acute point, enlarged and decurrent 

 on the lower side to an auricle rounded 

 in the upper part in joining the lamina 

 a little above its point of attachment to 

 the rachis ; medial nerve thick, ascend- 

 ing to the apex ; nervules tine and 

 numerous, uniform, at right angle to 

 the midrib, decurring to it at the point 

 of attachment, forking once near the 

 base. Type O. clara. 

 clara, Andrews, 1875, 

 Ohio Pal., vol. 2, p. 



419, Coal Meas. 

 gilberti, Andrews, 1875, 



Ohio Pal., vol. 2, p. 



420, Coal M. as. 

 Pachyphyllum, Lesque- 

 reux, 1858, Geo. Sur. 

 Pa., vol. 2. [Ety. 

 pachys, thick ; phyllon, 

 a leaf.] This name 

 was preoccupied in 

 the class Polypi. See 

 Rhacophyllum. 



affine, see Rhacophyllum 

 affine. 



fimbriatum, see Rhaco- 

 phyllum fimbriatum. 



hirsutum, see Rhaco- 

 phyllum hirsutum. 



laceratum, see Rhaco- 

 phyllum laceratum. 



lactuca, see Rhaco- 

 phyllum lactuca. 



PACHYPTERIS, Brongniart, 1828, Prodr. Hist. 

 Veg. Foss., p. 49. [Ety. pachys, thick ; 

 pteris, fern.] Frond pinnate or bipin- 

 nate, bearing opposite coriaceous pin- 

 nules, with a medial nerve or without 

 nervation, narrowed toward the base, 

 not joined to the rachis. Type P. lan- 

 ceplata. 



gracillima, Lesquereux, 1870, Geo. Sur. 



111., vol. 4, p. 419, Coal Meas. 

 PAL.EOPHYCUS, Hall, 1847, Pal. N. Y., vol. 1, 

 p. 7. [Ety. palaios, ancient ; phykos, sea- 

 weed.] Stems simple or dichotomous, 

 branches cylindrical or slightly flat- 

 tened, obtuse, surface smooth or dotted. 

 Type P. tubulare. 



articulatum, Winchell, 1864, Am. Jour. 

 Sci. and Arts, 2d series, vol. 37, p. 231, 

 Potsdam Gr. 



beauharnoisense, Billings, 1862, Pal. 

 Foss., vol. 1, p. 98, Calcif. Gr. 



beverleyense, Billings, 1862, Pal. Foss., 

 vol. 1. p. 97, Potsdam Gr. 



congregatum, Billings, 1861, Pal. Foss., 

 vol. 1, p. 3, Potsdam Gr. 



divaricatum, Lesquereux, 1876, 7th Ann. 

 Rep. Geol. Sur. Ind., p. 138, Coal 

 Meas. 



funiculus, Billings, 1862, Pal. Foss., voL 

 1, p, 98, Calcif. Gr. 



FIG. 58. 



Orthogon i opt eris 



clara, part of a 



pinnule. 



