Suregada angustifolia(Baill ex Muell - Arg) Airyshaw

[Santhan P]

Suregada angustifolia(Baill ex Muell - Arg) Airyshaw; (= Gelonium lanceolatum aut non Willd, G. angustifolium Baill ex Muell - Arg.); Fam: Euphorbiaceae, Wild tree, Talakona, Chithoor dt, Andhrapradesh,

[Tapas Chakrabarty]

Nice photos.

On Thu, Feb 6, 2014 at 4:19 PM, Santhan P <ponsa...@gmail.com> wrote:

Suregada angustifolia(Baill ex Muell - Arg) Airyshaw; (= Gelonium lanceolatum aut non Willd, G. angustifolium Baill ex Muell - Arg.); Fam: Euphorbiaceae, Wild tree, Talakona, Chithoor dt, Andhrapradesh,

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[JM Garg]

[J.M. Garg]

  Keys from BSI Flora of India as given below are creating some doubt about it being Suregada lanceolata. Maybe Tapas ji can clarify further.

1a. Leaves obovate or oblanceolate, sharply acuminate at apex, up to 15 cm long; flowers small, few in fascicles; fruits smooth, deeply lobed, keeled on lobes, 7 - 10 mm in diam.

1. Suregada angustifolia

b. Leaves elliptic to oblong-elliptic, rounded or obtuse at apex, entire, up to 25 cm long; flowers rather large, many in cymes or clusters; fruits rough, obscurely lobed, 12 - 15 mm in diam.

2. Suregada multiflora

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From: Santhan P <ponsa...@gmail.com>

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J.M.Garg

[Tapas Chakrabarty]

It may be noted that the genus Suregada Roxb. ex Rottler exhibits extra-ordinary phenological plasticity. Each species seems to be connected to some other species with endless intermediated. Hence, species delimitations in the genus are based on some tendencies exhibited by the taxa rather than sharp discontinuities or differences.

In India, we have three recognized species, as follows:

1. Suregada bifaria (Roxb. ex Willd.) Baill., Hist. Pl. 5: 120. 1874; Ramana et al. in Phytotaxa 221: 183. 2015. – Gelonium bifarium Roxb. [Hort. Bengal. 73. 1814, nom. nud.] ex Willd., Sp. Pl., ed. 4, 4(2): 831. 1806.

Type (lectotype, designated by Ramana et al., 2015): India, Roxburgh s.n. (B-W18501-020!). Remaining original material: India, Roxburgh s.n. (B-W10501-010!).

Distribution: India (Andaman & Nicobar Islands), throughout Malesia to N Australia.

Usually recognizable by the bilocular fruits.

2. Suregada lanceolata (Willd.) Kuntze, Revis. Gen. Pl. 2: 619. 1891. – Gelonium lanceolatum Willd., Sp. Pl., ed. 4, 4(2): 832. 1806; Roxb., Hort. Bengal. 73. 1814 & Fl. Ind. 3: 831. 1832.

Type India, Klein 782 (holotype B-W18502-010, digital image!).

Link: https://herbarium.bgbm.org/object/BW18502010

= Gelonium angustifolium Müll.Arg. in DC., Prodr. 15(2): 1128. 1866. – Suregada angustifolia (Müll.Arg.) Airy Shaw in Kew Bull. 23: 128. 1969.

Type (first-step lectotype, designated by Airy Shaw, 1969): Sri Lanka, Adams Peak, March 1846, Thwaites CP [Ceylon Plants] 252 (K). Second-step lectotype (designated by Chakrabarty in Ann. Pl. Sci. 8: 3634. 2019): Sri Lanka, Thwaites CP [Ceylon Plants] 252 (K000247072, digital image!; isolectotypes G00319624, K000247073, digital images!). Additional syntypes: India, Cochin, Johnston s.n. (K000247071, digital image!); Sri Lanka, Thwaites CP [Ceylon Plants] 696 (G00319623, G00319625, K000247068, digital images!); Sri Lanka, Thwaites CP [Ceylon Plants] 2101 (G00319622, digital image!).

Distribution: Sri Lanka and peninsular India.

Distinguished from S. multiflora usually by the narrowly oblong-elliptic to lanceolate-oblong or  narrowly oblong- obovate to oblanceolate leave, fewer flowers per cymule and smaller fruits (usually up to 1 cm in diameter). However, these characters may overlap.

3. Suregada multiflora (A. Juss.) Baill., Étude Euphorb. 396. 1858. – Gelonium multiflorum A. Juss., Euphorb. Gen. 111, t. 10, f. 31A. 1824.

Type (lectotype, designated by Chakrabarty in Ann. Pl. Sci. 8: 3633. 2019): [icon] in A. Juss., Euphorb. Gen. 111, t. 10, f. 31A. 1824.

= Gelonium fasciculatum Roxb. [Hort. Bengal. 73. 1814, nom. nud. (as fascuculatum)] Fl. Ind. 3: 832. 1832.

Type (lectotype, designated by Chakrabarty in Ann. Pl. Sci. 8: 3633. 2019):  Without locality (presumably India), No collector s.n. [7891] (K001128695, digital image!). Remaining original material: Icones Roxburghianae, No. 124 (CAL!, K, image!).

 Distribution: India, Bangladesh, Myanmar, China, Laos, Vietnam, Thailand, Malaysia, Sumatra, Celebes and Lesser Sunda Islands.

See differences from S. lanceolata as given above.

[Ponnutheerthagiri Santhan]

Thank you very much Tapas ji for your clear detailed explanation.

Thanks & regards

Dr. Santhan P

Industrial R&D expert, Plant taxonomist

Author of the Books "Trees of our Life" (Botany, Chemistry, Medicine).

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Medicinal Plants of commercial importance

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[Ponnutheerthagiri Santhan]

You can consider the flower character here Garg ji(Flowers few,small in fascicles)

[J.M. Garg]

Thanks, Tapas ji.

What do you think the posted species can be?

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With regards,
J.M.Garg

[J.M. Garg]

Thanks a lot, Tapas ji

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With regards,
J. M. Garg

On Wed, 7 Jun, 2023, 13:13 Tapas Chakrabarty, <tcha...@gmail.com> wrote:

Suregada lanceolata.