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A
sweetpotato stem is cylindrical and its length, like that of the
internodes, depends on the growth habit of the cultivar and the
availability of water in the soil. The erect cultivars are approximately 1
metre long, while the very spreading ones can reach more than 5-metre
long. Some cultivars have stems with twining characteristics. The
internode length can vary from short to very long, and according to stem
diameter, can be thin or thick.
Depending on
the cultivar, the stem colour varies from green to totally pigmented with anthocyanin
(red purple colour). The hairiness in the apical shoots, and in some
cultivars also in the stems, varies from glabrous
(without hairs) to very pubescent (very
hairy).
Source:
Huaman, Z. Systemic botany and morphology of the sweetpotato plant. Technical
Information Bulletin 25. International Potato Centre, Lima, Peru. 22 p.
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Growth
habit
Root
system
Leaves
Flowers
Fruit
and seeds
Storage
root
Stages
of plant development
 Sweetpotato
stem (Z. Huaman).
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