EXPLANATION OF PLATES. 461 



PLATE 29. LuDWiGiA sph^rocarpa (page 238). Fig. 1. flower, side view ; J?^. 2. in- 

 side of the same : fig. 3. cross section of a capsule : jig. 4. seed : fig. 5. 

 embryo. 



30. EcHiNocYSTES LOBATA (page 250). Fig. 1. androecium, consisting of three 



diadelphous stamens in close contact : fig. 2. fertile flower, with the ovary 

 enlarged : fig. 3. style and stigmas : fig. 4. section of the ovary (all mag- 

 nified) : fig. 5. ripe fruit burst open at the summit ; fig. 6. cross section 

 of the same : fig. 7. seed (all nat. size). 



31. Sanicula Marilandica (page 264). Fig. 1. umbellet, showing the fertile 



and sterile flowers : fig. 2. young fruit : fig. 3. half of a mature fruit : 

 fig. 4. one of the hooked prickles : fig. 5. section of the fruit : all mag. 



32. Sanicula Canadensis (page 265). Fig. 1. umbellet of sterile flowers and 



young fruit : fig. 2 fruit : fig. 3. section of the fruit : fig. 4. one of the 

 hooked prickles : all magnified. 



33. ZiziA coRDATA (page 270). Fig. 1. fruit ; fig. 2. section of the same, both 



magnified. 



34. Thaspium atropurpureum (page 272). Fig. 1. fruit, natural s\7.Q;figs. 2. 



& 3. the same magnified ; fig. 4. cross section of the same, more mag. 



35. CoNiosELiNUM Canadense (page 275). Fig. 1. umbel of fruit, natural size : 



fig. 2. fruit, magnified ; fig. 3. cross section of the same, also magnified. 



36. Arciiangelica hirstjta (page 277). Fig. 1. umbellet of fruit, natural size : 



fig. 2. flower : fig. 3. section of the fruit ; the last two magnified. 



37. Arciiemora rigida (page 278), exhibiting varieties in the form and breadth 



of the leaves. Fig. 1. flower, magnified ; fig. 2. umbellet of fruit, natural 

 size : fig. 3. cross section of the fruit, magnified. 



38. OsMORRHizA LONGisTYLis (page 281). Fig. 1. flower : fig. 2. fruit; both 



magnified. 



39. Erigenia bulbosa (page 283). Fig. 1. umbellet of flowers, natural size : 



fig. 2. flower ; jfig. 3. pistil (both magnified) : fig. 4. fruit, natural size : 

 fig. 5. fruit ; fig. 6. cross section of the same (both magnified). 



40. Aralia nudicaulis (page 285). Fig. 1. an umbel of pistilliferous flowers 



(apeialous and without stamens), natural size : fig. 2. a perfect flower, 

 magnified : fig. 3. transverse section of the ovary ; fig. 4. longitudinal 

 section of tiie same, both magnified. 



41. CoRNUs paniculata (page 289), with the ripe fruit and separate flowers ; all 



of natural size. 



42. LoNicERA ciLiATA (page 299). A. Flowering branch. B. Branch in fruit. 



Fig. 1. stamen : fig. 2. style and stigma : fig. 3. section of the ovary : 

 fig. 4. berries : fig. 5. seed, natural size ; fig. 6. the same magnified, and 

 cut lengthwise : fig. 7. embryo. 



43. Viburnum pubescens (page 306). Fig. A. fruit, nat. size : fig. 1. corolla 



laid open : /i^'. 2. ovary ; fur. 3. the same laid Ofien : fig. 4. transverse 

 Bcciion of the ovary : fig 5. fruit, magnified ; fi-^. 6. transverse section of 

 the same : fig. 7. longitudinal scclion of the seed : fig. 8. embryo. 



