The North American Slime-Moulds / A Descriptive List of All Species of Myxomycetes Hitherto Reported from the Continent of North America, with Notes on Some Extra-Limital Species

EXPLANATION OF PLATE XIII

Heterotrichia gabriellæ Mass., p. 257.

Fig. 1. A group of sporangia, one expanded, the others empty, × 15.

Fig. 1 a. Capillitium of the species, × 600.

Calonema aureum Morg., p. 266.

Fig. 2. A cluster of sporangia, magnified about 15 times.

Fig. 2 a. The tip of an elater of the same species, × 1000.

Fig. 2 b. A single spore, × 1000.

Fig. 2 c. A bit of the sporangium wall, × 600.

Stemonitis pallida Wing., p. 169.

Fig. 3. Sporangia, magnified about 5 times.

Comatricha pulchella (Bab.) Rost., form C. persoonii R., p. 183.

Fig. 4. Sporangia, magnified about 15 times.

See Addenda, d, p. 283.

Stemonitis carolinensis Macbr., p. 170.

Fig. 5. Sporangia, magnified about 5 times.

Clastoderma debaryanum Blytt., p. 191.

Fig. 6. Sporangium, magnified about 60 times.

Trichia contorta Rost., p. 269.

Fig. 7. Tip of an elater, × 1400.

Fig. 7 a. Spore of the same species, × 1400.

Trichia botrytis Pers., p. 274.

Fig. 8. Tip of the elater, × 1400.

Fig. 8 a. Spore of the same species, × 1400.

EXPLANATION OF PLATE XIV

Badhamia magna Peck., p. 38.

Fig. 1. A cluster, of sporangia, × 10.

Cienkowskia reticulata (Alb. & Schw.) Rost., p. 111.

Fig. 2. Plasmodiocarp, × 15.

Fig. 2 a. A bit of the capillitium of the same, × 800.

Fig. 2 b. A single spore, × 1000.

Physarum oblatum Macbr., p. 91.

Fig. 3. Sporangia, × 15.

Fig. 3 a. A piece of capillitium, × 800.

Fig. 3 b. A single spore, × 1000. The roughness much exaggerated.

Badhamia orbiculata Rex., p. 37.

Fig. 4. A group of sporangia, × 10.

Physarum newtoni Macbr., p. 73.

Fig. 5. A group of sporangia, × 16.

Fig. 5 a. A single spore, × 1000.

Fig. 5 b. A bit of the capillitium, × 800.

Physarum maculatum Macbr., p. 77.

Fig. 6. A cluster of sporangia, × 10.

Fig. 6 a. A piece of the capillitial net, × 800.

Fig. 6 b. A single spore, × 800.

Lepidoderma tigrinum (Schrad.) Rost., p. 145.

Fig. 7. A group of sporangia, × 20.

EXPLANATION OF PLATE XV

Physarum confertum Macbr. n. n., p. 64.

Fig. 1. Sporangia on a bit of leaf, × 4.

Fig. 1 a. Capillitium, × 800.

Fig. 1 b. A single spore, × 1200.

Physarum notabile Macbr., p. 80.

Fig. 2. A group of sporangia, stipitate form, × 10.

Fig. 2 a. A single spore, × 1200.

Physarum flavicomum Berk., p. 93.

Fig. 3. A cluster of sporangia, one closed, × 10.

Fig. 3 a. A single spore, × 1200.

Physarum tropicale Macbr., p. 82.

Fig. 4. Sporangia, × 10.

Fig. 4 a. Capillitium, × 800.

Fig. 4 b. A single spore, × 1200.

Craterium minutum (Leers) Fr., p. 107.

Fig. 5. Sporangia, the stalks unusually long, × 15.

Physarum penetrale Rex, p. 70.

Fig. 6. A group of sporangia; the calcareous crust has fallen in all.

Fig. 6 a. A single sporangia, enlarged to show columella, × 20.

Physarum nicaraguense Macbr., p. 83.

Fig. 7. A group of sporangia, × 15.

Fig. 7 a. Capillitium, strongly calcareous, × 800.

Fig. 7 b. A single spore, × 1200.

See also Pl. XVII., Figs 11 and 11 a.

EXPLANATION OF PLATE XVI

Physarella oblonga (Berk. & C.) Morgan, p. 109.

Fig. 1. Fully opened sporangium, × 10.

Fig. 1 a. Tubular sporangia closed, × 5.

Fig. 1 b. Transverse section of sporangium; shows trabecular calcareous nodules of the capillitium, × 15.

Craterium cylindricum Mass., p. 106.

Fig. 2. Group of sporangia, × 10.

Physarum wingatense Macbr., p. 72.

Fig. 3. Group of sporangia, × 10.

Physarum albescens Ellis, p. 86.

Fig. 4. Group of sporangia, × 10.

Fig. 4 a. Capillitium of the same species, × 200.

Dianema harveyi Rex, p. 238.

Fig. 5. Group of sporangia, × 10.

Fig. 5 a. Clustered spores, D. corticatum, × 500.

Fig. 5 b. Capillitial threads and spores, D. harveyi, × 200.

Fig. 5 c. Twisted, spirally striate single threads, × 500; D. corticatum, List.

Physarella oblonga Berk. & C., p. 109.

Fig. 6. Terrestial, plasmodiocarpous phase, × 10.

Physarum megalosporum Sturg., p. 63.

Fig. 7. Group of sporangia, × 8.

Fig. 7 a. Capillitium and spores, × 150.

Didymium complanatum (Batsch) Rost., p. 116.

Fig. 8. Capillitial structure, × 200.

Physarum wingatense, p. 72.

Fig. 9. Sporangium, × 20, enlarged to show dehiscence.

Didymium xanthopus (Ditm.) Fr., p. 123.

Fig. 10. Sporangium—diagram to show columella, × 20.

Didymium eximium Pk., p. 124.

Fig. 11. Group of sporangia, × 10.

Fig. 11 a. Section of sporangium, × 30; diagram.

Fig. 11 b. Spore, × 750.

Comatricha elegans (Racib.) List., p. 182.

Fig. 12. A single sporangium, × 20.

Clastoderma debaryanum, p. 191.

Fig. 13. Sporangium, seen in section, × 20.

Stemonitis herbatica Pk., p. 171.

Fig. 14. Group of sporangia, × 2.

Fig. 14 a. The same enlarged to show general outline.

Fig. 14 b. The same; capillitial section, × 20.

Fig. 14 c. A single spore, × 1000.

EXPLANATION OF PLATE XVII

Cribraria argillacea (Pers.) Schrad., p. 218.

Fig. 1. Sporangium, highly magnified.

Cribraria macrocarpa Schrad., p. 219.

Fig. 2. Sporangium, highly magnified.

Cribraria aurantiaca Schrad., p. 221.

Fig. 3. Sporangium containing spores, × 30.

Cribraria microcarpa Schrad., p. 226.

Fig. 4. Sporangium containing spores, × 30.

Cribraria tenella Schrad., p. 225.

Fig. 5. Sporangium containing spores, × 40.

Cribraria minutissima Schw., p. 220.

Fig. 6. A single sporangium calyculate, × 50.

Fig. 6 a. A smaller sporangium without calyx, with spore-mass.

Cribraria cuprea Morg., p. 229.

Fig. 7. A single sporangium, × 50.

Cribraria violacea Rex, p. 227.

Fig. 8. A single sporangium, × 40.

Cribraria piriformis Schrad., p. 224.

Fig. 9. A single sporangium, × 30.

Perichaena depressa (Libert) Rost., p. 242.

Fig. 10. A cluster of sporangia, one open, × 8.

Physarum nicaraguense Macbr., p. 83.

Fig. 11. Single sporangium, × 10.

Fig. 11 a. A cluster of sporangia and hypothallus, × 5.

EXPLANATION OF PLATE XVIII

Margarita metallica (Berk. & Br.) List., p. 237.

Fig. 1. A group of sporangia, × 15.

Fig. 1 a. Capillitium and spores, × 300.

Fig. 1 b. A single spore, × 1200.

Diderma cor-rubrum n. s., p. 140.

Fig. 2. A group of sporangia, × 15.

Diderma asteroides List., p. 143.

Fig. 3. Sporangia-spread, × 6.

Fig. 3 a. Same sporangia still unopened, × 4.

Comatricha laxa Rost., Cf. Pl. V., 5 & 5 a, p. 184.

Fig. 4. Sporangia, × 10.

Diderma lyallii (Mass.) Macbr., p. 136.

Fig. 5. A group of sporangia, × 10.

Fig. 5 a. Capillitium and spores, × 200.

Lepidoderma chailletii Rost., p. 146.

Fig. 6. A group of sporangia, × 15.

Fig. 6 a. Capillitium and spores, × 150.

Fig. 6 b. A single spore, × 800.

Didymium anellus Morg., p. 117.

Fig. 7. A group of sporangia, × 10.

Diderma radiatum Linn., p. 141.

Fig. 8. A group of sporangia, × 8.

Physarum diderma Rost., p. 55.

Fig. 9. A group of sporangia, × 10.

Diderma rugosum (Rex) Macbr., p. 144.

Fig. 10. A group of sporangia, × 10.

Diderma niveum (Rost.) Macbr., p. 137.

Fig. 11. A group of sporangia, × 10.

Fig. 11 a. Spore and Capillitium, × 600.

Prototrichia metallica (Berk.) Mass., p. 258.

Fig. 12. A group of sporangia, × 10.

Fig. 12 a. Same; capillitium and spores, × 300.

Fig. 12 b. Tip of a capillitium thread to show spiral markings and end-fraying, × 800.

Comatricha aequalis Peck, p. 180.

Fig. 13. A group of sporangia, × 5.

Fig. 13 a. Sporangium tip, capillitium, × 200.

Fig. 13 b. Spore, × 800.

Physarum compressum Alb. & Schw., p. 80.

Fig. 14. A group of sporangia to show compressed form, × 10.

See also Plate XIX., Fig. 12.

EXPLANATION OF PLATE XIX

Dictydium cancellatum Batsch, p. 230.

Fig. 1. The finest phase, as the form appears in the Mississippi valley, × 15.

Fig. 1 a. Sporangium of the same seen from below, × 35.

Fig. 1 b. Sporangium—same—seen from above, × 35.

Fig. 1 c. Cribraria-like net from the top, × 200.

Fig. 2. Vertical section of what is believed the typical European form, × 20.

Fig. 3. An ellipsoidal piriform phase—var. prolatum, × 15.

Physarum compressum Alb. & Schw. form P. affine Rost., p. 80.

Fig. 4. A group of sporangia, × 12.

Fig. 4 a. A single spore, × 600.

Fig. 4 b. Capillitium, same species, × 300.

Alwisia bombarda Berk. & Br., p. 209.

Fig. 5. Open sporangia, × 6.

Fig. 5 a. Sporangium of same enlarged to show capillitium, × 20.

Cribraria dictydiodes Cke. & Balf., p. 222.

Fig. 6. A group of sporangia, × 6.

Fig. 6 a. Single sporangium of same—lateral view, × 25.

Fig. 6 b. Same; base view, × 30.

Cribraria aurantiaca Schrad., p. 221.

Fig. 7. Single sporangium, × 30.

Cribraria rufa (Roth) Rost., p. 220.

Fig. 8. Sporangium, × 30.

Cribraria piriformis Schrad., p. 224.

Fig. 9. Sporangium, × 30.

Cribraria splendens (Schrad.) Pers., p. 221.

Fig. 10. Sporangium, × 30.

Echinostelium minutum DeBy., p. 198.

Fig. 11. Several sporangia, × 15.

Fig. 11 a. Vertical section, after Rost., × 500.

Physarum compressum Schw., p. 80.

Fig. 12. Sporangium, × 20, to show dehiscence.

Didymium anomalum Sturg., p. 127.

Fig. 13. Plasmodiocarps, about natural size.

Fig. 13 a. Diagrammatic vertical section, etc., to show the calciferous pillars distinguishing the species, × 200.

Fig. 14. Calcic crystal—enlarged.

Physarum sinuosum (Bull.) Weinm., p. 52.

Fig. 15. Plasmodiocarps passing to sporangia, × 5.

Cf. Plate VIII., 6 and 6 a.

Physarum bitectum List., p. 53.

Fig. 16. Plasmodiocarps as in 15, showing transitional phases, × 10.

EXPLANATION OF PLATE XX

Badhamia iowensis n. s., p. 36.

Fig. 1. Sporangia several presentations, × 15.

Fig. 1 a. Capillitium, × 200.

Fig. 1 b. Single spore, × 500.

Physarum mortoni n. s., p. 58.

Fig. 2. A group of sporangia, × 20.

Fig. 2 a. Capillitium, × 200.

Physarum discoidale n. s., p. 74.

Fig. 3. A group of sporangia, × 10.

Fig. 3 a. A single spore, × 800.

Didymium annulatum n. s., p. 125.

Fig. 4. Group of sporangia, × 15.

Fig. 4 a. Capillitium and spores, × 200.

Oligonema brevifilum Peck, p. 280.

Fig. 5. Capillitium, × 800.

Fig. 5 a. The same.

Fig. 12 b. A single spore, × 800.

Amaurochaete tubulina (Alb. & Schw.) Macbr., p. 150.

Fig. 6. Capillitium and spores, × 200.

Fig. 6 a. Spore, × 1200.

Physarum brunneolum (Phill.) Mass., p. 58.

Fig. 7. Group of sporangia.

Fig. 7 a. The same, mature, dehiscence beginning, × 10.

Fig. 7 b. A single spore, × 800.

Stemonitis uvifera n. s., p. 161.

Fig. 8. Colony, natural size.

Fig. 8 a. Capillitium and spore-clusters, × 30.

Fig. 8 b. Single spore-cluster, × 600.

Fig. 8 c. Spore, × 1000.

Stemonitis trechispora Berk., p. 160.

Fig. 9. Fructification—natural size.

Fig. 9 a. Capillitium, branch and threads, × 20—the spores enlarged.

Fig. 9 b. Netted spore, × 1000. Masking as an amaurochete; A. trechispora perhaps; compare 11, etc., below.

Stemonitis flavogenita Jahn, p. 169.

Fig. 10. A group of sporangia, × 3.

Fig. 10 a. Capillitium showing columella-tip, × 50.

Fig. 10 b. Spore, × 1200.

Stemonitis trechispora (Berk.) Torr., p. 159.

Fig. 11. A group of sporangia, × 3.

Fig. 11 a. Diagram of a single sporangium, a less rudimentary specimen, × 40.

Fig. 11 b. Capillitium enlarged to show branching columella, × 40.

Fig. 11 c. A single spore, × 1200.

Arcyria pomiformis (Leers) Rost., p. 255.

Fig. 12. A globose colony of sporangia, × 10; var. conglobosa.

Fig. 12 b. See under 5, above.

EXPLANATION OF PLATE XXI

Brefeldia maxima (Fr.) Rost., p. 154.

A typical, beautiful æthalium, about natural size.

EXPLANATION OF PLATE XXII

Brefeldia maxima Rost., p. 154.

Fig. 1. Plasmodium active; climbing the stump.

Fig. 2. Same plasmodium urgent; moving at the rate of 2 cm. per hour.

From photo-prints by Mr. W. A. Seaman and Mr. John T. Reeder, Mich. The figures are about one-sixth the natural size of the object. See plate preceding for the mature phase of this species, natural size.

EXPLANATION OF PLATE XXIII

Fuligo rufa Pers. p. 28.

1. The plasmodium; urgent!

2. The perfected fruit; quiescent.

The figures present their objects about natural size. See also Plate X., Figs. 3, 3 a, 3 b, for further illustration.

From photo-prints by John T. Reeder, Mich.