Nanorrhinum hastatum (R.Br. ex Benth.) Ghebr.

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit

Annual herb, glabrous to ± densely villous at the base and glabrous above or villous all over with glandular or eglandular hairs up to 1.5 mm long

Morphology Stem

Stems up to 65(–140) cm long, erect to ascending, trailing or somewhat scandent

Morphology Leaves

Basal leaves lanceolate to suborbicular, 4–10 x 1.5–4.5 mm, acute or obtuse at the apex, entire or shallowly dentate, attenuate at the base, caducous, petiole 3–8 mm long, not twining; upper leaves linear to lanceolate, (3–)8–32 x (0.2–)3–5 mm, acute at the apex, entire except for the basal lobes, hastate to sagittate or the uppermost with attenuate base, petiole 0.5–8 mm long, sometimes twining

Morphology Reproductive morphology Flowers Pedicel

Pedicels (7–)15–30 mm long, ± straight, but curved at the tip

Morphology Reproductive morphology Flowers Calyx

Calyx-lobes 2.5–3.5 x 0.5–0.8 mm, linear-lanceolate or lanceolate, acute, with narrowly to somewhat broadly scarious margins, glandular-puberulent to glabrous

Morphology Reproductive morphology Flowers Corolla

Corolla 3.5–12 mm long, yellow with darker palate, with sparse eglandular or glandular hairs outside; tube 1.6–2.5(–4.5) mm broad at mouth; palate lanate; spur 1.5–6(–9) mm long, almost at right angle with the rest of corolla, straight or ± curved, shorter than rest of corolla

Morphology Reproductive morphology Flowers Androecium Stamens Filaments

Abaxial filaments sparsely villous

Morphology Reproductive morphology Fruits

Capsule 2.5–3.5 mm long, ovoid, obtuse, glandular puberulent at the tip or glabrescent

Morphology Reproductive morphology Seeds

Seeds 0.4–0.6 mm long, oblong or reniform, tuberculate, reddish to dark-brown; tubercles columnar to conical, obtuse to subacute, entire.

Distribution

N1–3; Djibouti, Eritrea, Ethiopia, Sudan, Socotra, Arabian peninsula

Ecology

Altitude range 0–1450 m.

Note

This species is highly variable, particularly in leaf shape and flower size. In Somalia there are small-flowered forms (corolla 3.5–6 mm long) with often hastate leaves, and large-flowered forms with up to 12 mm long corollas and linear, non-hastate leaves. The latter are also altogether larger and more spreading plants. Similar large-flowered forms are also found in Ethiopia and southern Yemen.