Flora of North America species comparison

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Indigofera hirsuta

hairy indigo, roughhairy indigo
Habit Herbs, annual or biennial, brownish hirsute or pilose, hairs long-spreading.
Stems

erect or sprawling, unbranched or branched, 3–10 dm.
Leaves

4–12.5 cm;

stipules narrowly subulate, 10–13 mm;

petiole 0.8–1.2 cm;

stipels 1–3 mm;

petiolules 1.5–2 mm;

leaflets 3–7(or 9), opposite, blades elliptic to obovate, 15–60 × 7–25 mm, base cuneate, apex rounded, short-mucronate, surfaces pubescent.
Racemes

10–20+-flowered, dense, 6–20 cm.
Peduncles

4–9 cm.
Pedicels

1–2 mm.
Flowers

6–7 mm;

calyx 3.5–5 mm, lobes setaceous, bristly-plumose;

corolla salmon red to maroon.
Legumes

dark brown, deflexed, cylindric, straight, 15–22 mm, leathery, hispid.
Seeds

6–8, greenish, cuboid.
2n

= 16.

Indigofera hirsuta
Phenology Flowering year-round.
Habitat Roadsides, old fields, disturbed woodlands, urban waste areas.
Elevation 0–50 m. (0–200 ft.)
Distribution
from FNA
AL; FL; GA; MS; SC; se Asia; Africa [Introduced in North America; introduced also in Mexico (Guerrero, Oaxaca, Tabasco), West Indies (Lesser Antilles, Puerto Rico), South America (Brazil, Ecuador, Guyana, Paraguay, Peru, Venezuela), Pacific Islands, Australia]
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Indigofera
Sibling taxa
I. caroliniana, I. colutea, I. decora, I. kirilowii, I. lindheimeriana, I. miniata, I. oxycarpa, I. pilosa, I. sphaerocarpa, I. spicata, I. suffruticosa, I. texana, I. tinctoria
Synonyms Anila hirsuta
Name authority Linnaeus: Sp. Pl. 2: 751. (1753)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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