16-213 16-213-t.jpg 16-213-v.jpg 88 16-213-h.jpg 344 Sequoiadendron giganteum, also known as Giant Sequoia or the Bigtee. The base of the tree may be in excess of 4 meters. Coniferophyta, Coniferales, Cupressaceae, habit Lab20
16-215 16-215-t.jpg 16-215-v.jpg 88 16-215-h.jpg 297 Sequoiadendron giganteum in a grove of giant sequoia trees. Coniferophyta, Coniferales, Cupressaceae, habit Lab20
16-216 16-216-t.jpg 16-216-v.jpg 174 16-216-h.jpg 307 Sequoiadendron giganteum view of the first branches, which may be as high as 20 or more meters above the ground. Coniferophyta, Coniferales, Cupressaceae, habit Lab20
16-217 16-217-t.jpg 16-217-v.jpg 40 16-217-h.jpg 159 Pinus pollen, showing prothallial, generative and tube cells in the microgametophyte. Coniferophyta, Coniferales, Pinaceae, reproductive, microgametophyte Lab21
16-218 16-218-t.jpg 16-218-v.jpg 135 16-218-h.jpg 244 Pinus male cone, or microsporangiate strobilis, showing the vasculature in cleared material. Coniferophyta, Coniferales, Pinaceae, reproductive, strobilus Lab21
16-219 16-219-t.jpg 16-219-v.jpg 72 16-219-h.jpg 250 Pinus male cone, or microsporangiate strobilis, in longitudinal section. Coniferophyta, Coniferales, Pinaceae, reproductive, strobilus Lab21
16-220 16-220-t.jpg 16-220-v.jpg 54 16-220-h.jpg 196 Pinus transfusion zone, consisting of tracheids located in the leaf's central vascular region. Coniferophyta, Coniferales, Pinaceae, vegetative Lab20
16-221 16-221-t.jpg 16-221-v.jpg 59 16-221-h.jpg 261 Pinus tracheids, as viewed in macerated secondary xylem, or wood. Coniferophyta, Coniferales, Pinaceae, vegetative Lab20
16-222 16-222-t.jpg 16-222-v.jpg 48 16-222-h.jpg 172 Podocarpus leaf, an example of a strap-shaped leaf, viewed in cross section. Note mesophyll differentiation. Coniferophyta, Coniferales, Podocarpaceae, vegetative Lab20
16-223 16-223-t.jpg 16-223-v.jpg 93 16-223-h.jpg 329 Coniferophyta, Coniferales, Pinaceae, vegetative Lab20
16-225 16-225-t.jpg 16-225-v.jpg 120 16-225-h.jpg 406 Coniferophyta, Coniferales, Pinaceae, vegetative Lab20
16-226 16-226-t.jpg 16-226-v.jpg 84 16-226-h.jpg 298 Coniferophyta, Coniferales, Cupressaceae, reproductive Lab21
16-227 16-227-t.jpg 16-227-v.jpg 26 16-227-h.jpg 109 Coniferophyta, Coniferales, Cupressaceae, reproductive Lab21
16-228 16-228-t.jpg 16-228-v.jpg 77 16-228-h.jpg 308 Coniferophyta, Coniferales, Cupressaceae, reproductive Lab21
16-229 16-229-t.jpg 16-229-v.jpg 60 16-229-h.jpg 210 Coniferophyta, Coniferales, Cupressaceae, reproductive Lab21
16-230 16-230-t.jpg 16-230-v.jpg 51 16-230-h.jpg 230 Coniferophyta, Coniferales, Cupressaceae, reproductive Lab21
16-231 16-231-t.jpg 16-231-v.jpg 160 16-231-h.jpg 291 Coniferophyta, Coniferales, Pinaceae, habit, ecology Lab20
16-232 16-232-t.jpg 16-232-v.jpg 224 16-232-h.jpg 410 Coniferophyta, Coniferales, Pinaceae, habit, ecology Lab20
16-233 16-233-t.jpg 16-233-v.jpg 217 16-233-h.jpg 393 Coniferophyta, Coniferales, Pinaceae, habit, ecology Lab20
16-233 16-233a-t.jpg 16-233a-v.jpg 34 16-233a-h.jpg 116 Coniferophyta, Coniferales, Podocarpaceae, reproductive Lab20
16-234 16-234-t.jpg 16-234-v.jpg 192 16-234-h.jpg 350 Coniferophyta, Coniferales, Pinaceae, vegetative, ecology Lab20
16-234 16-234a-t.jpg 16-234a-v.jpg 40 16-234a-h.jpg 150 Coniferophyta, Coniferales, Podocarpaceae, reproductive Lab21
16-235 16-235-t.jpg 16-235-v.jpg 59 16-235-h.jpg 243 Coniferophyta, Coniferales, Cupressaceae, reproductive Lab21
16-236 16-236-t.jpg 16-236-v.jpg 60 16-236-h.jpg 221 Coniferophyta, Coniferales, Araucariaceae, reproductive Lab21
16-237 16-237-t.jpg 16-237-v.jpg 226 16-237-h.jpg 379 Coniferophyta, Coniferales, Araucariaceae, reproductive Lab21
16-238 16-238-t.jpg 16-238-v.jpg 239 16-238-h.jpg 417 Coniferophyta, Coniferales, Araucariaceae, vegetative Lab20
16-239 16-239-t.jpg 16-239-v.jpg 59 16-239-h.jpg 246 Coniferophyta, Coniferales, Araucariaceae, vegetative Lab20
16-240 16-240-t.jpg 16-240-v.jpg 193 16-240-h.jpg 341 Coniferophyta, Coniferales, Araucariaceae, vegetative Lab20
16-241 16-241-t.jpg 16-241-v.jpg 175 16-241-h.jpg 310 Coniferophyta, Coniferales, Araucariaceae, vegetative Lab20
16-242 16-242-t.jpg 16-242-v.jpg 158 16-242-h.jpg 290 Coniferophyta, Coniferales, Araucariaceae, vegetative Lab20
16-252 16-252-t.jpg 16-252-v.jpg 105 16-252-h.jpg 405 Cycadophyta, Cycadales, reproductive, microsporangiate strobilus Lab19
16-253 16-253-t.jpg 16-253-v.jpg 71 16-253-h.jpg 285 Cycadophyta, Cycadales, reproductive, microsporangiate strobilus Lab19
16-255 16-255-t.jpg 16-255-v.jpg 87 16-255-h.jpg 347 Cycadophyta, Cycadales, reproductive, megasporogenesis Lab19
16-283 16-283-t.jpg 16-283-v.jpg 84 16-283-h.jpg 305 Cycadophyta, Cycadales, reproductive, microsporogenesis Lab19
16-284 16-284-t.jpg 16-284-v.jpg 81 16-284-h.jpg 332 Cycadophyta, Cycadales, reproductive, megasporogenesis Lab19
16-286 16-286-t.jpg 16-286-v.jpg 82 16-286-h.jpg 296 Cycadophyta, Cycadales, reproductive, megasporogenesis Lab19
16-287 16-287-t.jpg 16-287-v.jpg 118 16-287-h.jpg 478 Cycadophyta, Cycadales, reproductive, megasporogenesis Lab19
16-288 16-288-t.jpg 16-288-v.jpg 49 16-288-h.jpg 202 Cycadophyta, Cycadales, reproductive, megagametogenesis Lab19
16-289 16-289-t.jpg 16-289-v.jpg 49 16-289-h.jpg 217 Cycadophyta, Cycadales, reproductive, megagametophyte Lab19
16-290 16-290-t.jpg 16-290-v.jpg 63 16-290-h.jpg 263 Cycadophyta, Cycadales, reproductive, megagametophyte Lab19
16-291 16-291-t.jpg 16-291-v.jpg 53 16-291-h.jpg 237 Cycadophyta, Cycadales, reproductive, microgametophyte Lab19
16-292 16-292-t.jpg 16-292-v.jpg 68 16-292-h.jpg 258 Cycadophyta, Cycadales, reproductive, microgametophyte Lab19
16-293 16-293-t.jpg 16-293-v.jpg 164 16-293-h.jpg 317 Cycadophyta, Cycadales, reproductive, microgametophyte Lab19
16-294 16-294-t.jpg 16-294-v.jpg 54 16-294-h.jpg 217 Cycadophyta, Cycadales, reproductive, microgametophyte Lab19
16-295 16-295-t.jpg 16-295-v.jpg 65 16-295-h.jpg 261 Cycadophyta, Cycadales, reproductive, microgametophyte Lab19
16-296 16-296-t.jpg 16-296-v.jpg 61 16-296-h.jpg 246 Cycadophyta, Cycadales, reproductive, microgametophyte Lab19
16-297 16-297-t.jpg 16-297-v.jpg 43 16-297-h.jpg 198 Cycadophyta, Cycadales, reproductive, microgametophyte Lab19
16-298 16-298-t.jpg 16-298-v.jpg 65 16-298-h.jpg 308 Cycadophyta, Cycadales, reproductive, embryogenesis Lab19
16-299 16-299-t.jpg 16-299-v.jpg 63 16-299-h.jpg 261 Cycadophyta, Cycadales, reproductive, embryogenesis Lab19
16-300 16-300-t.jpg 16-300-v.jpg 81 16-300-h.jpg 344 Cycadophyta, Cycadales, reproductive, embryogenesis Lab19
16-301 16-301-t.jpg 16-301-v.jpg 70 16-301-h.jpg 301 Cycadophyta, Cycadales, reproductive, embryogenesis Lab19
16-420 16-420-t.jpg 16-420-v.jpg 176 16-420-h.jpg 310 Lab21
16-421 16-421-t.jpg 16-421-v.jpg 64 16-421-h.jpg 234 Lab21
16-422 16-422-t.jpg 16-422-v.jpg 46 16-422-h.jpg 212 Coniferophyta, Coniferales, Pinaceae, reproductive, embryogenesis Lab21
16-423 16-423-t.jpg 16-423-v.jpg 76 16-423-h.jpg 275 Coniferophyta, Coniferales, Pinaceae, reproductive, embryogenesis Lab21
16-424 16-424-t.jpg 16-424-v.jpg 68 16-424-h.jpg 249 Coniferophyta, Coniferales, Pinaceae, reproductive, embryogenesis Lab21
16-425 16-425-t.jpg 16-425-v.jpg 27 16-425-h.jpg 149 Coniferophyta, Coniferales, Pinaceae, reproductive, embryogenesis Lab21
16-426 16-426-t.jpg 16-426-v.jpg 93 16-426-h.jpg 331 Coniferophyta, Coniferales, Pinaceae, reproductive, embryogenesis Lab21
16-427 16-427-t.jpg 16-427-v.jpg 66 16-427-h.jpg 247 Coniferophyta, Coniferales, Pinaceae, reproductive, megagametogenesis Lab21
16-428 16-428-t.jpg 16-428-v.jpg 77 16-428-h.jpg 296 Coniferophyta, Coniferales, Pinaceae, reproductive, megagametogenesis Lab21
16-429 16-429-t.jpg 16-429-v.jpg 98 16-429-h.jpg 355 Coniferophyta, Coniferales, Pinaceae, reproductive, megagametogenesis Lab21
16-430 16-430-t.jpg 16-430-v.jpg 100 16-430-h.jpg 350 Coniferophyta, Coniferales, Pinaceae, reproductive, megasporogenesis Lab21
16-431 16-431-t.jpg 16-431-v.jpg 107 16-431-h.jpg 369 Coniferophyta, Coniferales, Pinaceae, reproductive, megagametogenesis Lab21
marsil marsilea-archneck-t.jpg marsilea-archneck-v.jpg 31 marsilea-archneck-h.jpg 175 Marsilea fertilized megasporangiumwith sperm and sperm trails in the sperm lake. Interference contrast microscopy. Pteridophyta, Marsileales, heterosporous reproduction Lab15
marsil marsilea-archneck-vert-t.jpg marsilea-archneck-vert-v.jpg 30 marsilea-archneck-vert-h.jpg 171 Marsilea fertilized megasporangium with archegonial neck cells showing and disintegrated axial row. Many sperm cells are present in the matrix. Pteridophyta, Marsileales, heterosporous reproduction Lab15
marsil marsilea-archneck2-t.jpg marsilea-archneck2-v.jpg 32 marsilea-archneck2-h.jpg 219 Marsilea fertilized megasporangiumwith sperm and sperm trails in the sperm lake. Interference contrast microscopy. Pteridophyta, Marsileales, heterosporous reproduction Lab15
marsil marsilea-archneck3tif-t.jpg marsilea-archneck3tif-v.jpg 30 marsilea-archneck3tif-h.jpg 167 Marsilea fertilized megasporangiumwith sperm and sperm trails in the sperm lake. Interference contrast microscopy. Pteridophyta, Marsileales, heterosporous reproduction Lab15
marsil marsilea-fert-bf-t.jpg marsilea-fert-bf-v.jpg 30 marsilea-fert-bf-h.jpg 157 Marsilea fertilized megasporangium. The grayish material in the surrounding gelatin consists of sperm and sperm trails. Brightfield illumination. Pteridophyta, Marsileales, heterosporous reproduction Lab15
marsil marsilea-fert-t.jpg marsilea-fert-v.jpg 48 marsilea-fert-h.jpg 243 Marsilea fertilized megasporangium. The light material in surrounding gelatin are sperm and sperm trails. Darkfield illumination. Pteridophyta, Marsileales, heterosporous reproduction Lab15
marsil marsilea-fert2-t.jpg marsilea-fert2-v.jpg 46 marsilea-fert2-h.jpg 236 Marsilea fertilized megasporangium. The light material in surrounding gelatin are sperm and sperm trails. Darkfield illumination. Pteridophyta, Marsileales, heterosporous reproduction Lab15
marsil marsilea-sperm-40-125-t.jpg marsilea-sperm-40-125-v.jpg 15 marsilea-sperm-40-125-h.jpg 141 Marsilea sperm cells in the gelatin matrix surrounding the megagametophyte. Differential interference contrast microscopy. Pteridophyta, Marsileales, heterosporous reproduction Lab15
marsil marsilea-sperm-40-125a-t.jpg marsilea-sperm-40-125a-v.jpg 15 marsilea-sperm-40-125a-h.jpg 141 Marsilea sperm cells in the gelatin matrix surrounding the megagametophyte. Differential interference contrast microscopy. Pteridophyta, Marsileales, heterosporous reproduction Lab15
marsil marsilea-sperm-40-77-t.jpg marsilea-sperm-40-77-v.jpg 17 marsilea-sperm-40-77-h.jpg 135 Marsilea sperm cells in the gelatin matrix surrounding the megagametophyte. Differential interference contrast microscopy. Pteridophyta, Marsileales, heterosporous reproduction Lab15
marsil marsilea-sperm-t.jpg marsilea-sperm-v.jpg 15 marsilea-sperm-h.jpg 135 Marsilea sperm cells in the gelatin matrix surrounding the megagametophyte. Differential interference contrast microscopy. Pteridophyta, Marsileales, heterosporous reproduction Lab15
marsil marsilea-spermlake-t.jpg marsilea-spermlake-v.jpg 33 marsilea-spermlake-h.jpg 190 Marsilea fertilized megasporangium. The light material in surrounding gelatin are sperm and sperm trails. Darkfield illumination. Pteridophyta, Marsileales, heterosporous reproduction Lab15
marsil marsilea-spermlake2-t.jpg marsilea-spermlake2-v.jpg 33 marsilea-spermlake2-h.jpg 192 Marsilea fertilized megasporangium. The light material in surrounding gelatin are sperm and sperm trails. Darkfield illumination. Pteridophyta, Marsileales, heterosporous reproduction Lab15
zamia- zamia-sperm-t.jpg zamia-sperm-v.jpg 141 zamia-sperm-h.jpg 263 Zamia sperm cell, activated within the microgametophyte. Original microscope slide by Chamberlain. Cycadophyta, Lab19