Nicotiana sect. Trigonophyllae
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Nicotiana sect. Trigonophyllae is a section of the genus tobacco ( Nicotiana ). There are two types of it .
description
The types of section Trigonophyllae are annual or short-term perennial herbaceous plants . The leaves are sessile, spatulate and sticky hairy. The upper stem leaves encircle the stem.
The flowers open during the day. The crown is radially symmetrical, tubular and salver-plate-shaped and greenish white in color.
The number of chromosomes is n = 12.
distribution
The species are common in the southwestern United States and Mexico .
Systematics
The following species are included in the Trigonophyllae section :
- Nicotiana obtusifolia M. Martens & Galeotti
- Nicotiana palmeri A. Gray
proof
- Sandra Knapp, Mark W. Chase and James J. Clarkson: Nomenclatural changes and a new sectional classification in Nicotiana (Solanaceae) . In: Taxon , Volume 53, Number 1, February 2004. pp. 73-82.