A revision of trifoliolate Indigofera (Tribe Indigofereae: Fabaceae) in India- VIBHA CHAUHAN & ARUN K. PANDEY- Phytotaxa 220 (1): 001–029 (2015)-
Abstract– A revision of trifoliolate Indigofera in India is provided based on field studies, and examination of herbarium specimens. In India, 11 species and 4 varieties of trifoliolate Indigofera are recognized: Indigofera barberi, I. deccanensis, I. glandulosa, I. glandulosa var. sykesii, I. karuppiana, I. pedicellata, I. prostrata, I. santapaui, I. thothathrii, I. tirunelvelica, I. trifoliata, I. trifoliata var. duthiei, I. trita, I. trita var. maffeii and I. trita var. purandharensis. Of 11 species, seven species and three varieties are endemic. A key to the species, description and illustrations are provided along with data on flowering and fruiting, distribution, habitat, chromosome number, and ethnobotanical uses.

Occurrence of Indigofera prostrata Willdenow (Fabaceae) in Western Himalayan region: a new record to the Flora of Himachal Pradesh from Sirmour District-  Krishan Lal, Vibha Chauhan and Arun K. Pandey- Pleione 7(1): 270 – 274. 2013.-
Abstract – Present communication deals with new distributional record of Indigofera prostrata Willdenow (Fabaceae) in Himachal Pradesh, India. Previously this species was considered under Indigofera trifoliata Linnaeus.

Indigofera himachalensis (Fabaceae: Indigofereae), a new species from Himachal Pradesh, India- VIBHA CHAUHAN, ARUN K. PANDEY* & HANNO SCHAEFER- Phytotaxa 112 (2): 43–49 (2013)-
Abstract– Indigofera himachalensis, a new species of Fabaceae is described from Himachal Pradesh, India. It differs from I.heterantha in having longer and sparsely adpressed hairy pods and larger seeds that are greater in number per pod with a reticulo-rugulate pattern of the spermoderm.

Structure and evolution of the pod in Indigofera (Fabaceae) reveals a trend towards small thin indehiscent pods- VIBHA CHAUHAN and ARUN K. PANDEY*- Botanical Journal of the Linnean Society, 2014, 176, 260–276.-
Abstract– Pod morphology and anatomy have been studied in 28 species and four varieties of Indian Indigofera. Pods of Indigofera spp. differ with respect to size, the relative thickness of the fruit wall, the number of sclerenchymatous layers in the endocarp, the presence/absence of hypodermis and trichomes, and the presence of separation tissue. Anatomically, the pericarp is broadly characterized into three types: type I (thin pericarp and three to five sclerenchymatous layers in the endocarp), type II (intermediary pericarp thickness and six to eight sclerenchymatous layers), and type III (thick pericarp and more than eight sclerenchymatous layers). The distribution of these types across the tribe is not congruent with the current phylogenetic analyses. Type III pericarp (present in the early diverging lineages of the tribe) represents the most primitive state, whereas type I and type II pericarps are derived. Fruits of Indigofera generally show normal explosive dehiscence as a means of dispersal of seeds, although some species show adaptations for dispersal by wind. In Indigofera, dehiscence is caused by a separation layer present at the dorsal and ventral sutures except in some species (Indigofera hochstetteri, Indigofera karnatakana, Indigofera glandulosa var. sykesii, and Indigofera trita var. scabra) in which no separation tissue is present; these species show delayed dehiscence or an indehiscent condition. The indehiscent pod type is considered to be apomorphic. The taxonomic, functional, and evolutionary significance of morphological and anatomical features in fruits of the genus Indigofera has been evaluated. © 2014 The Linnean Society of London, Botanical Journal of the Linnean Society, 2014, 176, 260–276.

Chauhan, V., Subramaniam, S. and Pandey, A.K. 2013. Relationships of Indian Indigofera L. (Fabaceae) based on ITS sequences of nuclear ribosomal DNA. Phytomorphology 63 (3&4): 157-167.