A Monograph of Codonopsis and Allied Genera by De-Yuan Hong

By De-Yuan Hong

Codonopsis and its allied genera, are a gaggle of crops that are very important in economic climate and horticulture. A Monograph of Codonopsis and Allied Genera (Campanulaceae s. str.) bargains its viewers accomplished wisdom of those crops together with palynology, cytology, inhabitants biology, morphological description, geographical distribution with vouchers stated, very good ink illustrations, and colour photographs, and keys to genera and to species.

This very good paintings will facilitate identity of proper vegetation, use of plant assets, review of endangered states, the improvement of conservation innovations, and may advertise systematic and evolutionary study of this group.

  • Provides accomplished descriptions and classifications of Codonopsis and allied genera
  • Richly illustrated with line drawings and top quality colour photographs
  • Delineates and clarifies the relationships of Codonopsis and its allied teams according to the analyses utilizing facts from exterior morphology, pollen morphology, chromosomes, and molecular biology

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Additional resources for A Monograph of Codonopsis and Allied Genera

Example text

Colpate/colporate pollen (with elongate apertures): This type of pollen is polytypical. s. with the same result as Erdtman’s (1952) and Dunbar’s (1975), but she classified pollen in the family into three groups and seven types: Palynogroup I. Cyananthus Type: Cyananthus, Codonopsis, Leptocodon. Ostrowskia Type: Ostrowskia Palynogroup II. Subgroup A Platycodon Type: Platycodon Canarina Type: Canarina Subgroup B Campanumoea (= Cyclocodon) Type: Campanumoea (Cyclocodon) parviflora Palynogroup III Subgroup A Campanula Type: Adenophora, Astrocodon, Asyneuma, Azorina, Berenice, Brachycodonia, Campanula, Cephalostigma, Cryptocodon, Cylindrocarpa, Edraianthus, Gadellia, Heterochaenia, Heterocodon, Jasione, Jasionella, Legousia, Lightfootia, Merciera, Michauxia, Microcodon, Musschia, Popoviocodonia, Roella, Sergia, Specularia, Symphyandra, Trachelium, Tracheliopsis, Triodanis, Wahlenbergia.

F. & Thomson, since he just enumerated Campanumoea parviflora and Campanumoea celebica. Moeliono (1960) merged Campanumoea s. l. (including Cyclocodon) with Codonopsis. Hong (1983) still recognized Campanumoea s. l. as an independent genus. Shen and Hong (in Hong, 1983) divided Codonopsis into three subgenera, subgs. Codonopsis, Pseudocodonopsis Kom. (1908) and Obconicicapsula D. Y. Hong (1980). Hong and Pan (1998) restored Cyclocodon at generic state based on observations on pollen and seed-coat morphology, combined with external morphology.

We found that the former two have 3-colporate pollen correlated with spiral ornamentations on the radial walls of the seed-coat, whereas the latter two have 5–8-colpate pollen correlated with bead-like ornamentations on the radial walls. As a result they restored Cyclocodon to generic level. This action was soon accepted by Lammers (1998, 1999). The seed develops from an ovule within the ovary. Seed morphology should therefore be relatively slightly influenced by changes in environments. Shetler and Morin’s (1986) work and ours (Hong & Pan, 1998) indicate that the seed-coat may serve as generic or other taxonomic markers.

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