Digitaria bicornis

Digitaria bicornis (Lam.) Roem. & Schult., Syst. Veg. 2: 470 1817. (Syn: Digitaria barbata Willd.; Digitaria barbulata Desv.; Digitaria bicornis subsp. gamblei Henrard; Digitaria biformis Willd. …; Digitaria commutata Schult.; Digitaria corymbosa subsp. marathensis Henrard .; Digitaria diversiflora Swallen; Digitaria nuda subsp. senegalensis Henrard; Digitaria queenslandica Henrard; Digitaria rottleri Roem. & Schult. [Invalid]; Digitaria sanguinalis f. commutata (Schult.) Haines; Digitaria setigera subsp. marathensis (Henrard) Henrard ex Bor .; Panicum adpressum Willd. [Illegitimate]; Panicum adpressum Forssk.; Panicum aegyptiacum var. blepharanthum (T.Durand & Schinz) Chiov.; Panicum appressum Kunth [Illegitimate]; Panicum barbatum (Willd.) Kunth [Illegitimate]; Panicum bicorne (Lam.) Kunth; Panicum biforme (Willd.) Kunth; Panicum ciliare A.Rich. [Illegitimate]; Panicum commutatum (Schult.f.) Nees [Illegitimate]; Panicum glaucescens Nees [Illegitimate]; Panicum macrostachyum Hochst. ex T.Durand & Schinz [Invalid]; Panicum neesii Kunth; Panicum sanguinale var. barcaldinense Domin ..; Paspalum bicorne Lam.; Paspalum sanguinale var. commutatum (Schult.) Hook.f.; Syntherisma barbata (Willd.) Nash);
.
W. Indian Ocean, Tropical & Subtropical Asia to N. Australia: Andaman Is., Bangladesh, Bismarck Archipelago, Borneo, Cambodia, China South-Central, China Southeast, East Himalaya, Hainan, India, Jawa, Laos, Lesser Sunda Is., Madagascar, Malaya, Maluku, Mauritius, Myanmar, Nepal, New Guinea, Nicobar Is., Northern Territory, Philippines, Queensland, Rodrigues, Réunion, Sri Lanka, Sulawesi, Sumatera, Thailand, Vietnam, West Himalaya, Western Australia; Introduced into: Alabama, Argentina Northeast, Argentina Northwest, Bahamas, Bolivia, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Cameroon, Caroline Is., Cayman Is., Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, Fiji, Florida, Georgia, Guatemala, Haiti, Hawaii, Honduras, Iowa, Jamaica, Japan, Leeward Is., Libya, Louisiana, Marianas, Mauritania, Mexican Pacific Is., Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Mississippi, Nauru, Netherlands Antilles, Nicaragua, North Carolina, Panamá, Paraguay, Puerto Rico, Samoa, South Carolina, Texas, Turks-Caicos Is., Uruguay, Venezuela, Virginia, Wake I., Windward Is. as per POWO;
.
Common name: Asian Crabgrass

---

Annuals. Culms to 50 cm high; nodes glabrous. Leaves 4-10 x 0.3-0.6 cm, linear-lanceolate, base rounded, apex acute or acuminate; sheaths lax, to 5 cm long; ligules to 3 mm long, truncate, membranous. Racemes usually 2, rarely 3 or more, each 5-12 cm long. Rhachis winged, serrate. Spikelets binate, heteromorphous, 2.5-3.5 mm long, oblong-elliptic, sessile ones glabrous or sparsely pubescent, pedicelled ones pectinate, pubescent. Lower glume scaly, sometimes absent. Upper glume 1-2.5 mm long, lanceolate, chartaceous, silky pubescent. Lower floret empty. Upper floret bisexual. First lemma 2.5-3.5 x 1 mm, elliptic-lanceolate, chartaceous, 7-nerved. Second lemma 2.5-3 x 1 mm, elliptic-lanceolate, acuminate, crustaceous. Palea 2.5-3 x 0.5-1 mm, elliptic-lanceolate, crustaceous, 2-keeled. Stamens 3; anthers c. 1 mm. Stigmas c. 1 mm long pink.

---

.

---

Grass identification -3: 3 high res. images.
Habitat: grow on wasteland 

Digitaria biformis

---

.

---

Identify the grass sp 2: 1 high res. image.
Identify the grass sp collected from Andhra university campus on 03/11/24

---

There are two grasses in the centre – The major one is Digitaria bicornis and the tall one towards the top is Echinochloa colona

---

 

---

.

References:
POWO  The Plant List Ver.1.1  WCSP  Grassbase  GRIN  Flora of China  Annotated checklist of Flowering plants of Nepal India Biodiversity Portal  IBIS Flora