Yam, commonly known as yam. It is also known as Mashan in supermarkets in Hebei and other places. Herbs perennial, stems creeping, often purple, roots cylindrical, leaves opposite, ovate or elliptic, flowers milky, dioecious. The roots contain starch and protein and can be eaten.
Yam morphological characteristics:
The rhizome is thick and straight, and can grow up to 1 meter. Leaves alternate, to the middle of the opposite, rare or 3 rotations, often between the leaves and buds (zero remainder), the shape of the leaves vary, triangular ovate to triangular broad ovate, often 3 shallow to deep. Flowers dioecious, very small, greenish white, both spikelike, male inflorescence erect, female inflorescence. The capsule has 3 wings. Perennial entangled herb; stalk or rooted underground stalk; leaf alternate, sparsely opposite, simple or palmately compound, entire lobed or divided; flowers dioecious; rarely homologous, composed of spikelike, sessate Or panicles; perianth segments 6, 2, basally connate; stamens 6, sometimes 3-locate, 3-locate; female flowers and male flowers similar, but stamens degenerate or absent; sublocate inferior, 8-loculed, style 3, isolated; Capsule or berry; seed winged.
Yam growth habits:
The first type of yam: the stem is cylindrical, the leaves are triangular-ovate to triangular-shaped and broadly ovate, and the base is valvate. Male inflorescences spikelike, not drooping, long axis ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± The order is similar, the ovary stigma · 3 cracks. Capsules have 3 wings, fruit wings are several equal in length, short stalks, 2 seeds per chamber, centered at birth; seeds ovoid, surrounded by chestnut-colored thin wings, wing width of about 6 mm, unequal width around . Flowering period from June to August, fruiting period from August to October.
The second type of yam: vegetatively propagated, the stem is cylindrical, the leaves are heart-shaped, and there is no flower. The yam bean is born between the leaves and leaves. The leaves of the yam are stalked after the leaves are wilted in autumn and winter.
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