Keys from Flora of Bhutan by E Aitken as per efi thread:
1. Flowers crowded in racemes or terminal clusters, (sometimes also with 1-2 axillary flowers) ……. 2
+ Flowers axillary, not crowded into racemes or clusters, (sometimes with small terminal cluster) …. 5
2. Leaves lanceolate or narrowly elliptic; racemes long and slender, leafless …… 3
+ Leaves broadly ovate; racemes dense, leafy ……. 4
3. Leaves elliptic, 3-9cm; petiole 10-30mm …….. 3. L. decurrens
+ Leaves elliptic to lanceolate, 0.8-2cm; petiole up to 10mm ……. 4. L. lobelioides
4. Leaves 0.5-l.5cm long; pedicels 2-15mm; corolla 4-7mm long ……. 1. L. prolifera
+ Leaves 1-3.5cm long; pedicels 1-3mm; corolla 7-10mm long …….  9. L. congestiflora
5. Leaves 1-3cm long; pedicels 2-l0(-20)mm …….. 6
+ Leaves 1.5-7.5cm long; pedicels 10-40mm ……….. 8
6. Leaves alternate; flowers pale pink or white …….. 2. L chenopodioides
+ Leaves opposite; flowers yellow ………… 7
7. Plants puberulous throughout; pedicels short, 2-6mm; corolla 6-12mm long …… 8. L. japonica (should be Lysimachia debilis Wall. as per details herein) 
+ Plants softly hirsute throughout; pedicels long, 5-10(-20)mm; corolla 3-6mm long …… 9. L. ferruginea
8. Leaves broadly ovate; calyx 6-12mm; corolla 8-15mm long ……… 5. L. evalvis
+ Leaves elliptic to lanceolate; calyx 3-6mm; corolla 4.5-8mm long . . …. .. 9
9. Leaves 1.5-4.5cm; pedicels 10-20mm; calyx lobes lanceolate with minute glands …….6. L. alternifolia
+ Leaves 2-7cm; pedicels 20-40mm; calyx lobes ovate, without glands …….… 7. L. Iaxa

.

Lysimachia candida Lindl. (SW India as per POWO (Lysimachia leschenaultii Duby syn. of Lysimachia candida Lindl.); China (Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Hubei, Hunan, Jiangsu, Jiangxi, Shaanxi, Shandong, Sichuan, Yunnan, Zhejiang), Taiwan, Tibet, Japan (Honshu), Myanmar [Burma], Vietnam as per Catalogue of Life)

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Lysimachia chenopodioides Watt ex Hook. fil. (SE-Tibet, China (Yunnan), Bhutan, India, Myanmar [Burma] (Kachin, Sagaing), Nepal, Pakistan (Hazara, Murree), Jammu & Kashmir (Poonch, Kashmir, Jammu) as per Catalogue of Life)

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Lysimachia congestiflora Hemsl. (China (Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hubei, Hunan, Jiangsu, Jiangxi, Qinghai, Shaanxi, Sichuan, Yunnan, Zhejiang), Taiwan, Tibet, India, Myanmar [Burma], Nepal, N-Thailand, Vietnam, Bhutan, Darjeeling, Sikkim as per Catalogue of Life)

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Lysimachia debilis Wall. (Plants red to black glandular punctate or striate as per keys in Flora of China vis-à-vis Plants epunctate or translucent glandular punctate of Lysimachia japonica Thunb.
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Lysimachia deltoidea Wight (NE-India, Sri Lanka, Myanmar [Burma] (Kachin, Sagaing), Bhutan, Assam, Darjeeling, Nepal as per Catalogue of Life)

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Lysimachia evalvis Wall. (SE-Tibet, India, Myanmar [Burma], Nepal, Bhutan, Darjeeling, Sikkim as per Catalogue of Life)


Lysimachia lobelioides Wall. (China (W-Guangxi, Guizhou, SW-Sichuan, Yunnan), Bhutan, India, Laos, Myanmar [Burma] (Mandalay), Nepal, N-Thailand, Java, Jammu & Kashmir (Kashmir), Vietnam as per Catalogue of Life)
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Lysimachia maritima (L.) Galasso
(Pakistan (Kurram, Chitral), Pakistani Kashmir (Baltistan, Skardu), Jammu & Kashmir (Rupshu)……. as per Catalogue of Life)
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(China (W-Sichuan, NW-Yunnan), S-Tibet, India, Nepal, Bhutan, Darjeeling, Sikkim, Chumbi, Myanmar [Burma], Pakistan (Hazara), Jammu & Kashmir (Zanskar) as per Catalogue of life)
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Lysimachia pyramidalis Wall. (India, Nepal, Jammu & Kashmir (Kashmir) as per Catalogue of Life)

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Lysimachia tetragona D. Don (Bhutan, Darjeeling, Sikkim, India, Nepal as per Catalogue of life)
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BSI Flora of India Checklist Volume 2 (1993) (Distribution):

Name Distribution
Lysimachia alternifolia Andhra Pradesh, Himachal Pradesh, Jammu & Kashmir, Uttarakhand
Lysimachia assamica Arunachal Pradesh
Lysimachia candida Andhra Pradesh, Bihar, Madhya Pradesh, Maharashtra, Odisha, Kerala, Tamil Nadu
Lysimachia chenopodioides Himachal Pradesh, Jammu & Kashmir, Sikkim, Uttarakhand
Lysimachia clementsoniana Kerala, Tamil Nadu
Lysimachia congestiflora Arunachal Pradesh
Lysimachia debilis Arunachal Pradesh, Jammu & Kashmir
Lysimachia decurrens Andhra Pradesh, Arunachal Pradesh, Madhya Pradesh., Jammu and Kashmir, Himachal Pradesh, Uttarakhand
Lysimachia deltoidea Arunachal Pradesh, Assam, Kerala, Meghalaya, Tamil Nadu, West Bengal
Lysimachia evalvis var. evalis (Arunachal Pradesh, Mizoram, Nagaland)
var. sessiliflora Biswas
Lysimachia ferruginea Arunachal Pradesh, Himachal Pradesh, Uttarakhand
Lysimachia japonica Arunachal Pradesh, Himachal Pradesh, Jammu & Kashmir, Nagaland, Sikkim, Uttarakhand
Lysimachia laxa Arunachal Pradesh, Assam, Meghalaya, Nagaland
Lysimachia leschenaultii Kerala, Tamil Nadu
Lysimachia linearifolia Assam, West Bengal
Lysimachia lobelioides Arunachal Pradesh, Assam, Bihar, Himachal Pradesh, Jammu & Kashmir, Meghalaya, Uttar Pradesh, Uttarakhand
Lysimachia maritima Jammu & Kashmir, Ladakh
Lysimachia metziana Tamil Nadu
Lysimachia peduncularis Sikkim, West Bengal
Lysimachia prolifera Arunachal Pradesh, Jammu & Kashmir, Himachal Pradesh, Uttarakhand, West Bengal
Lysimachia pyramidalis Himachal Pradesh, Jammu & Kashmir, Uttarakhand
Lysimachia rubiginosa Arunachal Pradesh, Jammu & Kashmir
Lysimachia vulgaris Jammu & Kashmir

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Binomial Habit Notes Ref. Distrib.
Lysimachia candida Lindl. subsp. obovata (Buch.-Ham.ex Hook.f.) Kunth (syn. of Lysimachia candida Lindl.) Herb Western Ghats,
Evergreen Forests
Flora of Tamil
Nadu, VOL. II, 1987; Gamble 1957
Nilgiri
Lysimachia leschenaultii Duby (syn. of Lysimachia candida Lindl.) Herb Western
Ghats, Evergreen Forests, Grasslands
Flora
of Tamil Nadu, VOL. II, 1987
Coimbatore,
Dindigul, Nilgiri, Theni
Lysimachia procumbens Baudo Trail ing
Herb
Western
Ghats, Evergreen Forests, Grasslands
Flora
of Tamil Nadu, VOL. II, 1987
Coimbatore,
Dindigul, Nilgiri

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Botanical name Synonyms Family Common name
Lysimachia alternifolia Lysimachia glandulosa, Lysimachia tetragona Primulaceae Himalayan Yellow Loosestrife
Lysimachia japonica Primulaceae Japanese Yellow Loosestrife
Lysimachia lobelioides Primulaceae Lobelia Loosestrife
Lysimachia maritima Glaux maritima Primulaceae Sea Milkwort
Lysimachia candida    Lysimachia obovata, Lysimachia inconspicua, Lysimachia notoniana Primulaceae Manipur Loosestrife
Lysimachia prolifera Primulaceae Branched Loosestrife
Lysimachia pyramidalis Anagallis multangularis, Lysimachia heterophylla Primulaceae Pyramidal Loosestrife


.

Lysimachia foenum-graecum (No distribution given in India)

Floriculture in India By Gurcharan Singh Randhawa, Amitabha Mukhopadhyay (1986)- Brief details-

World Spice Plants: Economic Usage, Botany, Taxonomy By Johannes Seidemann 1986)- Brief details-
Lysimachia obovata Buch.-Ham. ex Wall. (syn. of Lysimachia candida Lindl.)

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Lysimachia (Primulaceae) :  1 post by 1 author.

I have updated eFI (efloraofindia) page on Lysimachia

Attempts have been made to incorporate most of the species available in India & nearby areas with details & keys directly or through links as far as possible. It’s quite possible that there may be some discrepancy in the accepted names & synonyms taken from other links.

Species discussed so far in efloraofindia are given at the bottom of the page in the form of links against Subpages. On clicking them one can see all the details.

If someone can provide complete list of Indian species with source references it will be wonderful.
Any comments/ corrections are welcome.


.

Pl. go throughLysimachia ‎(Primulaceae) page with images of species in efloraofindia.
I request you to pl. go through & point out mistakes, if any. I hope this will aid in identifications in future. If anybody can send images of other species of this genera (for incorporation in the website), if any, or can identify unidentified images, it will be really nice.