These stickers were created for the Botany 2023 Colloquium: Attack of the (Haploid) Clones: the resurgence of gametophyte biology across land plants.

These images come from two books: An Introduction to Embryophyta Volume II: Pteridophytes (Parihar, 1965) and Plant Diversity: An Evolutionary Approach (Scagel, Bandoni, Rouse, Schofield, Stein, and Taylor, 1969).

Stickers were prepared and colored by Elissa Sorojsrisom. Full citations below - note that magnification is not accurate for stickers, but refers to magnification of the original illustration printing.

1. Riella americana. Sphaerocarpales. A, habit of Riella americana thallus with antheridia on margin, X3. Fig 12-8A, Scagel et al., 1969.

2. Lycopodium sp. From left to right: gametophytes of L. complanatum, L. cernuum, L. annotinum (after Bruchmann). Fig. 19B-D, Parihar, 1965.

3. Selaginella kraussiana. Dehiscent megaspore and rhizoids (after Bruchmann). Fig. 32B, Parihar, 1965.

4. Marsilea sp. Vertical sections through Marsilea sporocarp (sporoc), showing sori containing microsporangia on left, and sori with megasporangia on right, x15. (From Morphology of Vascular Plants; Lower Groups, by A. J. Eames). Fig. 17-30 Scagel et al., 1969.

5. Angiosperm pollen. From lower left to right: Fagus sylvatica (Fagaceae), three colporate with scabrate exine about 2.5 microns thick, × 600; Salix sitchensis (Salicaceae), tricolpate with fine but distinct reticulum, ×1,600; Bromus inermis (Graminae), with single pore characteristic of grass pollen (pore is covered by operculum, which is usually lost in grains processed for microscopic examination), ×500; Epilobium angustifolium (Onagraceae), with three large pores. ×400; Taraxacum sp. (Compositae), tricolpate having elaborate branching ridges with echinate projections on crests (ridges enclose lacunae with very thin exine-forming floor; surrounding ridges restrict opening of pore-like colpae, ×1,200). Fig 22-10A, B, E-F, Scagel et al., 1969.

6. Dryopteris felix-mas. Mature prothallus of Dryopteris felix-mas as seen from below (after Kny). Fig. 7, Parihar, 1965.

7. Monoclea fonasteri. Monocleales; portion of thallus with sporophytes, showing longitudinal dehiscence of the capsules, ×0.75. Fig. 12-7, Scagel et al., 1969.

8. Cycadales. Development of gynogametophyte of cycads; free nuclei around periphery of gametophyte, ×4 (from The Living Cycads by C. J. Chamberlain). Fig. 19-14C Scagel et al., 1969.

9. Dawsonia superba. Morphology and anatomy of subclass Polytrichidae. Fig. 12-15D Scagel et al., 1969.