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Nuttallanthus texanus (Scheele) D.A.Sutton
Family Plantaginaceae
Nuttallanthus texanus (Scheele) D.A.Sutton APNI*

Description: Slender glabrous biennial herb, 17–70 cm high, with fertile stems (1-)3–30, erect, mostly unbranched; vegetative stems many, prostrate or procumbent.

Leaves of fertile stems alternate distally,often 3- or 4-whorled basally, linear to oblong-elliptic (especially on vegetative stems), 7–34 mm long, 1–2.7 mm wide.

Inflorescence many-flowered, congested at anthesis, internodes elongating in fruit; bracts 2–3 mm long; pedicels ascending, 2–6(-9) mm long, Sepals 2.5–3.5 mm long, 1–4 mm wide. Corolla14–22 mm long, pale lilac or violet with white palate; spur 6–11 mm long, 0.4–0.6 mm wide at base; lower lip 6–11 mm long; upper lip 3–5 mm long.

Capsule obloid-ovoid, 2.5–4.5 mm long, glabrous; seeds blackish grey, 0.3–0.5 mm long, surface densely tuberculate, longitudinal ridges lacking or small, obtuse or rounded.


Flower
Photo A. Whitford

Flowering: Spring–summer

Distribution and occurrence: Occurring in areas of cultivation.
NSW subdivisions: *CC, *CWS, *NWP
Other Australian states: *Qld
AVH map***

In New South Wales, this species has previously not been distinguished from Nuttallanthus canadensis. The flowers of N. texanus has slightly larger flowers than those of N. canadensis, but the most readily diagnostic feature is the surface of the seed which is tuberculate in N. texanus whereas it is smooth between longitudinal ridges (wings) in N. canadensis,

Text by Barry Conn (2014)
Taxon concept: D.A. Sutton (1988) A revision of the tribe Anthirrhineae (Oxford University Press: London & Oxford)


APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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