شويعرة متدلية

الوصف النباتي

الأوراق

Leaves: Sheaths with double pilosity, shortly hispid on a puberulent background. Ligule up to 3 mm, lacerate-fimbriate. Blade flat, puberulent, ciliate-hispid.

الأزهار

Inflorescence & flowers: Panicle up to 15 cm, unilateral, often nodding, usually rather dense; axis pubescent; branches 3–5 per node, very slender, each with up to 10 spikelets, often pendulous. Spikelets green variegated with shiny white or violaceous, 10 mm long (excluding awns), with 4–9 flowers; rachilla fragile; upper flowers sterile. Glumes unequal, 8 and 12 mm, keeled, acute, scarious on margins. Lemma up to 15 mm, lanceolate, papery, scarious on margins, bifid at apex, with a straight, scabrid awn as long as or longer than lemma body. Variability noted: spikelets villous (var. genuinus G.G.) or glabrous (var. nudus Klett. & Richt.).

الثمار والبذور

Fruit: Caryopsis as in genus; not described in detail.

مواسم النبات

الفنلوجية

Phenology: Flowers May–July.

الانتشار الموثق

Lebanese distribution: Ct. Bir Hassan, Beirut, Tripoli; Mi. ‘Abey, Mar Roukhos; Mm. Hasroun, Hadeth, Akkar Mts, Ma‘asser, Dahr-el-Baidar, Jabal Sannine; Metn: Zahlé; Hermon: Rachaya.

Native range: According to POWO: Widespread across Europe, North Africa, Western and Central Asia, Siberia, and introduced widely in North America and elsewhere.

لمحة نباتية

بنية النبات

Life-form & habit: Annual grass, 5–50 cm tall, green or often reddish. Culms geniculate-ascending or erect, pubescent at nodes.

دورة الحياة

حولية

الفصيلة والتصنيف

الاسم العلمي المقبول

Bromus tectorum

الفصيلة

نجيلية

نباتات من الفصيلة نفسها

Imperata cylindrica

Lolium rigidum

بوص جنوبي

Phragmites australis subsp. australis (Cavanilles) Trinius ex Steudel

مكانس

Piptatherum miliaceum E.Fourn., 1866