progymnospermn.

1885 Nature 30 July 289/2 The Progymnosperms are among the earliest plants known, and already occupied an important position in Carboniferous floras.

1905 Philos. Trans. (Royal Soc.) B. 197 239 It might appear desirable to establish a group analogous to..the Progymnosperms..for the Palæozoic Spermophytes.

1962 Amer. Jrnl. Bot. 49 381/1 Just where Archaeopteris fits in the scheme of progymnosperm and gymnosperm evolution is impossible at present to conclude. That it is, indeed, a progymnosperm, is supported by much evidence.

1976 P. Bell & D. Coombe tr. Strasburger's Textbk. Bot. (new ed.) iii. i. 392 The historical sequence from the sporogenous progymnosperms to gymnosperms and finally to the angiosperms.

2000 Vancouver Sun (Nexis) 22 Apr. e5 Before the Devonian Period ended, Trimerophytes had been replaced by Progymnosperms, which, thanks to the evolution of true roots and stronger trunks, could grow even taller.

1886 Nature 25 Feb. 389/2 In the remote past..the cambium layer may have existed in an irregular or fugitive manner in the ‘pro-angiospermic’, as it did in the ‘pro-gymnospermic’ stem.

1885 Nature 30 July 289/2 The transformation is actually found to have progressed through three distinct stages—the progymnospermous, the gymnospermous, and the metagymnospermous.

1967 Amer. Jrnl. Bot. 54 767/2 Leaves of Coniferopsida arose from ultimate branchlets of progymnospermous ‘fronds’.

2003 Jrnl. Geol. Soc. 160 643 Extensive brackish bays existed during early highstand, distally fringed by gymnospermous and putative progymnospermous coastal and/or upland vegetation.