134 



PLANTS. 



[PHY. PRO- 



PIG. 62. Phytopsis 

 tubulosa. 



PHYTOPSIS, Hall, 1847, Pal. N. Y., vol. 1, p. 

 38. [Ety. phyton, plant ; opsis, resem- 

 blance.] Stems 

 cylindrical or 

 subcylindrical, 

 straight or flex- 

 uous, erect or 

 procumbent, 

 branched; 

 branches diverg- 

 ing and anasto- 

 mosing; struc- 

 ture cellular, 

 consisting ap- 

 parently of thin 

 laminae, y^h 

 transverse divis- 

 ions, or having a 

 reticulated struc- 

 ture. This struc- 

 ture is too ob- 

 scure for satis- 

 factory deter- 

 mination. Type P. tubulosa. 

 cellulosa, Hall, 1847, Pal. N. Y., vol. 1, 



p. 39, Birdseye Gr. 

 tubulosa, Hall, 1847, Pal. N. Y., vol. 1, 



p. 38, Birdseye Gr. 



PINNULABIA, Lindley & Hutton, 1835, Foss. 

 Flora, vol. 2, p. 81. [Ety. pinna, a 

 feather.] Roots or rootlets divided in 

 filaments of variable length and thick- 

 ness, and generally possessing few 

 definable characters. Type P. capil- 

 lacea. 

 calamitarum, Lesquereux, 1858, Geo. Sur. 



Pa., vol. 2, p. 878, Coal Meas. 

 capillacea, Lindley & Hutton, 1835, Foss. 



Flora, vol. 2, p. 81, Coal Meas. 

 confervoides, Lesquereux, 1858, Geo. Sur. 



Pa., vol. 2, p. 878, Coal Meas. 

 crassa, Dawson, 1863, Can. Nat., vol. 8, 



and Acad. Geol., p. 480, Coal Meas. 

 dispalans, Dawson, 1862, Quar. Jour. 



Geo. Soc., vol. 18, p. 312, Devonian, 

 elongata, Dawson, 1871, Foss. Plants Can., 



p. 33, Devonian, 

 ficoides, Lesquereux, 1868, Geo. Sur. Pa., 



vol. 2, p. 878, Coal Meas. 

 horizontalis, Lesquereux. 1858, Geo. Sur. 



Pa., vol. 2, p. 878, Coal Meas. 

 nodosa, Dawson, 1871. Foss. Plants Can., 

 p. 33, Devonian. *""": 



palmatifida, Lesquereux, 1860, (Rhizo- 

 lithes palmatifidus,) Geo. Sur. Ark., 

 vol. 2, p. 313, Coal Meas. 

 pinnata, Lesquereux,, 1858, Geo. Sur. Pa., 

 vol. 2, p. 878, Coal Meas. 



FIG. 63. Pinnularia ramosisslma. 



ramosissima, Dawson, 1863, Can. Nat., 

 vol. 8, and Acad. Geol., p. 480. Coal 

 Meas. 



PLUMALINA, Hall, 1858, Can. Nat. and Geo., 

 vol. 3, p. 175. [Ety. pluma, a small 

 feather.] Simple fronds, with linear 

 pinnules diverging, from each side, in 

 the same plane, and 

 more or less ascend- 

 ing. It is a peculiar 

 plant, described, 

 originally, as a Grap- 

 tolite, to which opin- 

 ion Prof. Hall still 

 adheres. On the 

 other hand, Prof. 

 Dawson claims the 

 characters prove it 

 is a vegetable, and 

 in this he is sup- 

 ported by the fact 

 that all Graptolites 

 had become extinct, 

 as shown by their 

 absence in several Flf , w 



groups of rocks be- Plnmalln ; p i umar ia. 

 fore the appearance 

 of this form. Type P. piumaria. 



densa, Hall, 1879, 30th Rep. N. Y. St. 

 Mus. Nat. Hist., pi. 4, fig. 6, Ham. Gr. 



gracilis, Shumard, 1855, (Filicites gracilis,) 

 Geo. Rep. Mo., p. 208, Waverly Gr. in 

 Lithographic limestone. 



linearigj Lesquereux, 1880, (Trochophyl- 

 lum lineare,) Coal Flora of Pa., p. 64, 

 Waverly Gr. 



piumaria, Hall, 1843, (Filicites?) Geo. 



Rep. p. 273, .and 4th Dist. N. Y., 



A Can . Nat. and 



V w Geo., vol. 3, 



m V P- 175, Che- 



^ 1^ mung Gr. 



9i ^ftt plumula, Daw- 



i 



( Lycopodites 



6lu mula, ) 

 ep. Foss. 



plants Low. 

 Carb . and 

 Mil Istone 

 Grit, p. 24, 

 Su bcarbonif- 

 erous. 



tes, Lind- 

 ey & Hut- 

 ton, 1833, 

 Foss. Flora, 

 vol. 1, p. 181. 

 This genus 

 was founded 

 upon a fish- 

 scale, and the 

 form referred 

 to it in Geo. 

 Sur. Pa., vol. 

 2, p. 847, is 

 quite a dif- 

 ferent thing. 



Polysporia, Newberry, syn. for Lepidostrobus. 

 mirabilis, see Lepidostrobus mirabilis. 



PROTOBLECHNUM, Lesquereux, 1880, Coal 

 Flora of Pa., p. 188. [Ety. protos, first,';. 



FIG. 65. 

 Protoblechnum holdeni. 



