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Page 55 · DO #4926 · 231_Rogers_Bx9FF8_r
- Collection
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David James Rogers (1918–2007) papers
- Item/Folder
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Manihot - Correspondence; Publication, 1972–1973
- Digital Object
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DO #4926,
page 55
- Collection-level dates
- 1948–1977
Page transcription
two branched (92), but commonly with one or two branches (excluding any branches at the top) (79), less frequently unbranched or a single branch at top (57).
Leaves with basic number of lobes odd, but occasionally with an even number of lobes; most frequently 7- or 8-lobed (148), sometimes 9- or 10-lobed (42), occasionally 5- or 6-lobed (23), rarely 3- or 4-lobed (4) or variable, 3-, 4- and 5-lobed (9) or 4-, 5- or 6-lobed (2). Leaf-lobe shape prevalently obovate (193) but sometimes linear (35). Leaf margins of obovate leaves usually simple (176), sometimes sinuous (15) and rarely pandurate (2); of linear-shaped lobes, margins commonly sinuous (26), occasionally simple (8), rarely pandurate (1). Length of median lobe most frequently long, greater than 17 cm (105), often of moderate length, 14 to 17 cm (86) and occasionally short, less than 14 cm (37). Width of median lobe predominantly moderate, 2.6 cm to 4.8 cm (160), sometimes narrow, 1.5 cm to 2.4 cm (36), or wide, 5 cm or more (32). Petioles mostly green (115), frequently red (73), occasionally reddish green (29), seldom greenish red (11). Young foliage most frequently green (142), often reddish blue (57), sometimes bluish green (29).
AIDS TO IDENTIFY AN UNKNOWN CULTIVAR
Fig. 3 gives the major categories we have used in the classification of the cultivars. Since this classification shows the relationships of the cultivars for their gross morphological characters, it is not always a simple matter to identify an individual cultivar. To use this classification, we suggest that the investigator describe the cultivar on the basis of as many of the characters given in Table 1 as are available. Having described the plant with the characters given, proceed to Fig. 3, which gives the major categories. Following discovery of the major subdivision to which a cultivar belongs (i.e., rough-rooted, obovate lobed leaves), one then recognizes that the unknown plant belongs to one of twelve groups (Fig. 3). Within the groups
