Trachyspermum Link

Ajowan caraway (en), Ajowan (fr)

Genus

Angiosperms > Apiales > Apiaceae

Characteristics

Herbs, perennial or annual. Taproot narrow. Stem erect, terete, much-branched, usually puberulous, rarely glabrous. Basal leaves 2–3-pinnate-ternate/pinnatisect; ultimate segments ovate, narrowly lanceolate to filiform, sessile or short-petiolulate, base usually broad-cuneate or truncate, margin sparingly irregularly serrate, dentate or entire, glabrous on both surfaces. Umbels compound, loose, terminal and lateral; peduncles slender; bracts and bracteoles absent, rarely present, linear; rays few, slender. Calyx teeth obsolete. Petals white, obovate, apex narrow, inflexed, abaxially sparsely scaberulous. Stylopodium conic; styles short, divaricate. Fruit ovoid-globose or broadly ellipsoid, base rounded or cordate, slightly flattened laterally, nearly round in cross section, white strigose or papillose; ribs 5, filiform, prominent to scarcely so; vittae (1–)2–3 in each furrow, 2–6 on commissure. Seed face plane. Carpophore 2-cleft to base.
More
Erect annual herbs. Leaves 2–3-pinnate, with long, narrow segments. Umbels numerous, compound, pedunculate; involucre generally present and of several bracts, occasionally absent or of only a single setaceous bract; involucel present, of several narrow bracteoles. Flowers all hermaphrodite. Calyx-teeth absent or very small. Petals white, with an inflexed lobule, emarginate above. Fruit papillose, hairy or verruculose, ovate, with no distinct beak, strongly laterally compressed and narrowed to the commissure; primary ribs slender and scarcely prominent to well defined, the mericarps rounded to obscurely 3-angled dorsally; vittae solitary in the valleculae and 2 on the commissure, large and conspicuous; stylopodia conical, disk almost absent, styles slender to very slender; carpophore bifid to the base. Endosperm rounded to bluntly pentagonal in section, the commissure almost flat.
Life form annual
Growth form herb
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Sexuality hermaphrodite
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Cultivation

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