diarch


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Related to diarch: diarchy

diarch

[′dī‚ärch]
(botany)
Of a plant, having two protoxylem points or groups.
References in periodicals archive ?
The primary root is diarch (Figure 2C,D), and consists of uniseriate epidermis with rectangular, oval and obovate cells.
Polyarc condition of primary root, seen in Calophyllum brasiliense differs from triarch or tetrarch condition registered to the root of Vismia guianensis, and the common pattern of seedlings' primary roots, which is diarch or triarch (EAMES, 1961).
The vascular cylinder of the primary root of seedlings is commonly diarch or tetrarch; other types seem to represent modifications of these basic types (EAMES, 1961).