Tamarix arceuthoides Bunge

Grows in the dry river beds and river banks of Baluchistan and Northern regions of Pakistan.

Shrubs or small trees, 2-4(-5) m tall. Branchlets spreading, dense; branches of current year mostly ascending. Leaves of vegetative branches subamplexicaul, ovate, ovate-lanceolate, or nearly triangular-ovate, 1-2 × ca. 0.6 mm, base slightly decurrent, margin often cartilaginous, apex long acuminate or acute; those of growing branches semiamplexicaul, narrowly ovate, base subrounded or decurrent, faintly auriculate, apex shortly acuminate. Racemes mostly in branches of current year, 3-6(-9) cm × 2.5-4 mm; flowers small and dense, usually clustered in fascicles, sometimes in lax terminal panicles, appearing in early summer and lasting to September, sometimes (in mountain areas) racemes appearing in spring on branches of previous year; bracts ovate-subulate or linear-lanceolate, 1-1.5 mm, equaling or exceeding calyx, apex acuminate. Pedicels 0.5-0.7 mm, shorter than or subequaling calyx. Calyx 5-fid; sepals ovate-triangular, 0.5-0.7 × ca. 0.3 mm, ca. 1/2 shorter than petals, margin membranous, subentire, apex slightly obtuse; outer 2 more obtuse than inner 3, tightly enveloping ovary after anthesis. Petals 5, completely open, white or pink to purple, obovate or elliptic, 1-1.7(-2) × ca. 0.5 mm, deciduous after anthesis. Disk often purple-red, 5-fid; lobes often retuse at apex or deeply subdivided into 10 lobules. Stamens 5; filaments long, often 1.2-2 × exceeding petals, slender, usually inserted between disk lobes; anthers small, apex obtuse or sometimes mucronate. Ovary narrowly conic, 0.7-1.3 mm; styles 3, short, 1/3-1/2 as long as ovary. Capsule small, ca. 3 mm, narrow. Fl. May-Sep. 2n = 24*.

Shrubs or under-sized tree, 2-3(-4) m tall with reddish brown-pinkish bark, densely branched, glabrous. Leaves sessile, with narrow base, somewhat ovate-deltoid, acute, with minutely papillose margin, (-1) 1.5-2.5 mm long; 0.5 mm broad. Inflorescence compound raceme, dense, erect or subspreading, both aestival and vernal, 1.5-5(-8) cm long, 2.5-4 mm broad. Bracts ovate, triangulate 1-1.5 mm long, 0.5 mm broad, acuminate, entire, pedicel 0.5-1 mm long, rarely equal to bracts. Calyx 5-lobed, sepals 0.5-0.75 mm long, 0.3 mm broad, ovate to trullate-ovate, finely denticulate, the outer 2 obtuse than the inner 3. Petals 5, obovate, 1-1.75 mm long, 0.5 mm broad, pink, caducous. Stamens 5, filaments slender, 2-3 mm long, anthers dorsifixed, acute-subobtuse, disc purplish, deeply 5-lobed, lobes notched, thus became obscurely 10 lobed, insertion of filaments peridiscal, inserted between the lobes of the disc (Mesodiscine disc), anthers subreniform, exapiculate to somewhat apiculate. Ovary conical, 0.75-1.25 mm long, styles3, very short, almost fused. Capsule 34 (-5) mm long, 1 mm broad, dehiscing by 3 longitudinal valves. Seeds many.

Distribution: Iraq, Iran, Russia, Afghanistan and Pakistan.

Fl. Per.: March-September.

River banks in Gobi Desert. Gansu, Xinjiang [Afghanistan, Mongolia, Pakistan; C and SW Asia].