EXPLANATION OF PLATES. 463 



PLATE 58. BiDENS Beckii (page 388). Fig. 1. disk-flower : fig. 2. outer scale of the 

 involucre ; Jig. 3. inner scale : fig. 4. ray-flower : fig. 5. awn. 



59. Cacalia atriplicifolia (page 401). Fig. 1. involucre -.fig. 2. flower, nat. 



size : fig. 3. flower, magnified. 



60. Arnica mollis (page 403). Fig. 1. ray-flower : fig. 2. disk-flower : fig. 3. 



hair of the pappus : all magnified. 



61. CiRsiuM ARVENSE (page 407). 



62. Lobelia siphilitica (page 424). Fig. a. calyx, magnified. 



63. Lobelia inflata (page 425). Fig. 1. transverse section of the capsule : 



fig. 2. the same, with the seeds removed, showing the placenta;. 



64. Lobelia cardinalis (page 425). Fig. a. capsule, with the adhering calyx 



and withered corolla. 



65. Specularia perfoliata (page 428). Fig. 1. perfect flower ; fig. 2. the same 



with tlie corolla removed ; both magnified : fig. 3. corolla of one of the 

 early or imperfect flowers, showing the fine minute valvate petals closed 

 over the stamens ; fig. 4. the same laid open, exhibiting the distinct petals, 

 minute stamens, and summit of the ovary with its sessile stigma ; both 

 magnified : figs. 5., 6. & 7. capsules of the imperfect flowers, of the 

 natural size, crowned with the calyx of 3, 4 and 5 teeth. 



66. Rhododendron (Azalea) viscosum (page 439). 



67. G.AYLUSSACIA iiiiiTELLA (dumosa), (page 448). Fig. 1. stamen, back view ; 



fig. 2. the same, side view : fig. 3. vertical section of the ovary and calyx : 

 fig. 4 section of the young fruit, showing the ten nucules. 



68. Chiogenes HispiDULA (page 450). Fi^-. 1 . flower, nat. size : /^^ 2. stamen, 



magnified ; fig. 3. the same, with the stamens and part of the corolla 

 removed, showing the disk : fig. 4. cross section of the ovary ; fig. 5. 

 longitudinal section of the same : fig. 6. fruit, nat. size ; fig. 7. the same, 

 magnified ; fig. 8. longitudinal section of the same ; fig. 9. cross section 

 of the same : fig. 10. seed : fig. 11. embryo. 



69. Pyrola tjliginosa (page 453). Fig. 1. stamen, side view ; fig. 2. the same, 



back view : fig. 3. pistil. 



70. Chimaphila maculata (page 455). Fig. 1. stamen : fig. 2. oxuxy; fig. 3. 



cross section of the same. 



71. Monotropa uniflora (page 456). Fig. 1. flower, with the corolla removed. 



fig. 2. stamen, magnified : fig. 3. pistil : fig. 4. cross section of the ovary: 

 fig. 5. ripe capsule and withered stamens. 



72. Hypopitiiys lanuginosa, red variety (page 457). Fig. 1. capsule, natural 



size : fig. 2. seed, greatly magnified. 



