Digitaria insularis is a species of grass commonly known as sourgrass. It is native to Central and South America and the southern parts of the United States and has been introduced into other parts of the world. It was first described by the German botanist Friedrich Karl Georg Fedde in 1904.
Digitaria insularis is a tufted perennial bunchgrass with very short, swollen rhizomes. The stems reach a height of 80–130 cm and are erect, branched from the lower and middle nodes, swollen bases, with woolly bracts, glabrous internodes and nodes. Sheaths papillose - pilose in their majority, ligule 4–6 mm long, blades linear, 20–50 cm long and 10–20 mm wide. Inflorescence 20–35 cm long, numerous clusters, 10–15 cm long, solitary triquetrous rachis of clusters, 0.4-0.7 mm wide, scabrous; spikelets lanceolate, 4.2-4.6 mm long, paired, caudate, densely covered with trichomes up to 6 mm long, brown or whitish, ranging up to 5 mm from the apex of the spikelet; lower glume triangular to ovate, to 0.6 mm long, enervate, membranous; upper glume 3.5-4.5 mm long, acute, 3-5 nerved, ciliated; inferior lemma as long as spikelet, acuminate, 7-nerved, covered with silky hairs, upper lemma 3.2-3.6 mm long, acuminate, dark brown; anthers 1-1.2 mm long.[3]
Digitaria insularis is native to the tropical and sub-tropical Americas.[4]
It is a common species found in disturbed areas and on beaches, at an altitude of up to 1,400 m (4,593 ft) above sea level.
In its native Brazil, Paraguay, Bolivia and Venezuela it is a pervasive weed out of its natural habitats. It has been introduced in tropical Asia and some Pacific islands and elsewhere. In some countries into which it has been introduced such as Hawaii and Papua New Guinea, it is considered an invasive species.[5]
Digitaria insularis is a species of grass commonly known as sourgrass. It is native to Central and South America and the southern parts of the United States and has been introduced into other parts of the world. It was first described by the German botanist Friedrich Karl Georg Fedde in 1904.
El camalote, Digitaria insularis, es una especie de fanerógama en el género Digitaria.
Es una planta perenne cespitosa; con tallos que alcanzan un tamaño de 80–130 cm de largo, erectos, ramificados desde los nudos inferiores y medios; bases hinchadas, con brácteas lanosas; entrenudos y nudos glabros. Vainas en su mayoría papiloso-pilosas; lígula de 4–6 mm de largo; láminas lineares, 20–50 cm de largo y 10–20 mm de ancho, escábridas. Inflorescencia 20–35 cm de largo, racimos numerosos, 10–15 cm de largo, solitarios, raquis de los racimos triquetro, 0.4–0.7 mm de ancho, escabroso; espiguillas lanceoladas, 4.2–4.6 mm de largo, pareadas, caudadas, densamente cubiertas con tricomas hasta 6 mm de largo, cafés o blanquecinos, extendiéndose hasta 5 mm del ápice de la espiguilla; gluma inferior triangular a ovada, hasta 0.6 mm de largo, enervia, membranácea, gluma superior 3.5–4.5 mm de largo, aguda, 3–5-nervia, ciliada; lema inferior tan larga como la espiguilla, acuminada, 7-nervia, cubierta por tricomas sedosos, lema superior 3.2–3.6 mm de largo, acuminada, café obscura; anteras 1–1.2 mm de largo.[1]
Especie común, se encuentra en playas y áreas perturbadas, a una altitud de 0–1400 m; fl y fr mar, jun–dic;[2] nativa del sur de los Estados Unidos a Argentina, también en las Antillas, introducida en Asia tropical y algunas islas del Pacífico.
Digitaria insularis fue descrita por (L.) Mez ex Ekman y publicado en Just's botanischer Jahresbericht. 31(1, 5): 778. 1904.[1]
Digitaria: nombre genérico derivado del latín "dígitus" = (dígito o dedo) ya que se distinguen por sus alargadas inflorescencias que parecen dedos.[3]
insularis: epíteto latino que significa "insular".
El camalote, Digitaria insularis, es una especie de fanerógama en el género Digitaria.
Digitaria insularis est une espèce de plantes monocotylédones de la famille des Poaceae, originaire des régions tropicales et subtropicales d'Amérique.
C'est une plante herbacée, vivace par ses rhizomes, qui se rencontre le long des routes et des voies ferrées, dans les pâturages, les champs cultivés et les forêts perturbées.
Elle a été introduite en Asie tropicale et en Océanie. On la considère dans certaines régions comme une plante envahissante, notamment en Nouvelle-Calédonie[2].
On a signalé des populations résistantes au glyphosate au Brésil et au Paraguay[réf. souhaitée].
Selon Catalogue of Life (21 février 2016)[3] :
Digitaria insularis est une espèce de plantes monocotylédones de la famille des Poaceae, originaire des régions tropicales et subtropicales d'Amérique.
C'est une plante herbacée, vivace par ses rhizomes, qui se rencontre le long des routes et des voies ferrées, dans les pâturages, les champs cultivés et les forêts perturbées.
Digitaria insularis là một loài thực vật có hoa trong họ Hòa thảo. Loài này được (L.) Mez ex Ekman mô tả khoa học đầu tiên năm 1912.[2]
Digitaria insularis là một loài thực vật có hoa trong họ Hòa thảo. Loài này được (L.) Mez ex Ekman mô tả khoa học đầu tiên năm 1912.
