Convolvulus humilis Jacq., Collectanea 4: 209. 1791. (Jacquin 1791: 209, t. 22).

Wood, John R. I., Williams, Bethany R. M., Mitchell, Thomas C., Carine, Mark A., Harris, David J. & Scotland, Robert W., 2015, A foundation monograph of Convolvulus L. (Convolvulaceae), PhytoKeys 51, pp. 1-282 : 120-121

91. Convolvulus humilis Jacq., Collectanea 4: 209. 1791. (Jacquin 1791: 209, t. 22). Figure 12, t. 1-10

Convolvulus undulatus Cav., Icon. 3: 39, t. 277. 1794. ( Cavanilles 1794: 39). Type. Plant of unknown origin ex Herb. Cavanilles (lectotype MA 94198!, sheet with original label, designated here).

Convolvulus ciliatus Roth, Catal. Bot. 1: 39. 1797. ( Roth 1797: 39). Type. Cultivated plant (holotype BREM).

Convolvulus evolvuloides Desf., Fl. Atlant. 1: 176. 1798. ( Desfontaines 1798: 176). Type. NORTH AFRICA, between Algiers and Tripoli (P, not seen).

Convolvulus strictus Lehm., Ind. Sem. Hort. Hamburg 1823: 17. 1823. ( Lehmann 1823: 17). Type. Cultivated plant (HBG, not seen).

Type.

Plant of unknown origin, cultivated in Vienna by Jacquin (not found at W).

Description.

Annual herb, commonly branched at the base with decumbent or ascending stems 5-25 cm long, vegetative parts glabrescent or shortly pubescent. Leaves 0.5-5 × 0.3-1.5 cm, oblong-oblanceolate, apex obtuse to rounded, margin entire, basal leaves gradually narrowed into a long petiole-like base up to 2 cm in length (so appearing spathulate), stem leaves abruptly narrowed at base, sessile and sometimes clasping and auriculate. Flowers solitary, subsessile in the axils of the upper leaves, becoming crowded towards the apex; peduncles and pedicels not clearly differentiated, 0-1 mm long; bracteoles filiform, minute; sepals 2.5-3.5 × 1.5-3 mm, narrowly elliptic to obovate, acute to rounded, thinly pilose; corolla 1-1.1 cm long, blue with a pale tube, distinctly lobed with triangular lobes, midpetaline bands pubescent, darkish; ovary long-pilose, style divided 1-1.5 mm above base, glabrous, stigmas 2 mm. Capsule pilose with stiff coarse hairs; seeds strongly tuberculate. [ Sa’ad 1967: 183; Feinbrun-Dothan 1978 (plate 59); Silvestre 2012: 272; Pignatti 1982: 388; Strid and Strid 2009: 398-399 (plate)]

Distribution.

Nearly circum-mediterranean but apparently absent from France, Turkey and the Balkans: Spain (Rivas s.n. [31/4/1946]); Portugal; Italy (Todaro 920); Sicily (Todaro); Morocco (Jahandiez 244, Hooker s.n. [5/1871]); Algeria (Balansa 357, Cosson s.n. [22/5/1852]); Libya (Pampanini & Pichi-Sermolli 6263); Palestine (Dinsmore 3721); Jordan (Abu Laila et al. 2005JOR-10-1); Syria: Jebel Druze (Gombault 5961); Cyprus (Syngrassides 1195).

Notes.

Similar morphologically to Convolvulus pentapetaloides but flowers sessile or nearly so.