Pteridospermous plants from the Pennsylvanian of Illinois and Missouri

[1] DARRAH WILLIAM C., 1937, BOT MUS LEAFLETS HARVARD UNIV, V4, P153

[2] KINSTON R, 1923, PALEONT, V2, P275

[3] Structure of seedlike fructifications found in coal balls from Harrisburg, Illinois - Contributions from the Hull Botanical Laboratory 431 [J]. BOTANICAL GAZETTE, 1932, 93 : 0151 - 0172

[4] LESQUEREUX L, 1880, 2 GEOL SURV PENNSYLV

[5] Lesquereux L., 1870, GEOLOGICAL SURVEY IL, V4, P377

[6] PENHALLOW DP, 1897, BOT GAZ, V23, P15

[7] RENAULT B, 1876, MEM PRESS DIV SAV AC, V22

[8] SCOTT DH, 1923, STUDIES FOSSIL BOT, V3

[9] SELLARDS EH, 1902, ILLINOIS AM J SCI, V164, P195

[10] A preliminary report on the anatomy and affinities of medullosa noei sp nov from the Pennsylvanian of Illinois [J]. AMERICAN JOURNAL OF BOTANY, 1937, 24 (03) : 124 - 125

[1] DARRAH WILLIAM C., 1937, BOT MUS LEAFLETS HARVARD UNIV, V4, P153

[2] KINSTON R, 1923, PALEONT, V2, P275

[3] Structure of seedlike fructifications found in coal balls from Harrisburg, Illinois - Contributions from the Hull Botanical Laboratory 431 [J]. BOTANICAL GAZETTE, 1932, 93 : 0151 - 0172

[4] LESQUEREUX L, 1880, 2 GEOL SURV PENNSYLV

[5] Lesquereux L., 1870, GEOLOGICAL SURVEY IL, V4, P377

[6] PENHALLOW DP, 1897, BOT GAZ, V23, P15

[7] RENAULT B, 1876, MEM PRESS DIV SAV AC, V22

[8] SCOTT DH, 1923, STUDIES FOSSIL BOT, V3

[9] SELLARDS EH, 1902, ILLINOIS AM J SCI, V164, P195

[10] A preliminary report on the anatomy and affinities of medullosa noei sp nov from the Pennsylvanian of Illinois [J]. AMERICAN JOURNAL OF BOTANY, 1937, 24 (03) : 124 - 125