040710GS1 Euphorbia from Kashmir

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Gurcharan Singh

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Jul 3, 2010, 10:58:09 PM7/3/10
to efloraofindia
040710GS1  Euphorbia from Kashmir. I find similar plant identified as E. dracunculoides at Flowers of India website, but having seen this species in Delhi, it is quite different with linear-lanceolate leaves, whereas this plant has leaves with much broader almost sessile leaf base.

Habitat: Grown in pots, sometimes in shaded corners
Habit: herbaceous plant, up to 70 cm tall
Leaves: mostly opposite, sessile, nearly ovate with long acuminate apex.
Inf: Axillary cyathium, nectaries semilunar, crescent shaped, ovary glabrous
Fruit: nearly 1cm, subglobular, 3-lobed, with three additional depression lines, on on each lobe, glabrous, green


--
Dr. Gurcharan Singh
Retired  Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
Phone: 011-25518297  Mob: 9810359089
http://people.du.ac.in/~singhg45/

Euphorbia-a.jpg
Euphorbia-b.jpg
Euphorbia-c.jpg

tanay bose

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Jul 4, 2010, 12:06:35 AM7/4/10
to Gurcharan Singh, efloraofindia

Euphorbia lathyris Linnaeus, Sp. Pl. 1: 457. 1753.

 

Some times spelled as Euphorbia lathyrus L., orth. var.

 

Herbs, annual, erect, up to 1(-1.5) m tall. Rootstock a simple taproot, slightly swollen in seedlings, up to more than 20 cm × 3-7 mm thick; lateral roots thin and branched. Stem single, gray-green, smooth and glabrous. Leaves opposite, decussate; stipules absent; petiole absent; leaf blade linear-lanceolate, 6-15(-20) × 0.4-2.5 cm, glabrous, base ± clasping stem, margin entire, apex acuminate or acute; midrib prominent adaxially, lateral veins inconspicuous. Inflorescence a terminal pseudumbel, often compound, eventually broad and lax; primary involucral leaves (2-)4 or 5(or 6), slightly yellowish green, narrowly elliptic to ovate-elliptic, somewhat unequal, margin entire, base rounded, primary rays (3 or)4 or 5; cymes regularly many forked; cyathophylls 2, ovate-triangular, 3-8 × 2-4 cm, base truncate to clasping, margin entire, apex acuminate or acute. Cyathium subsessile; involucre subcampanulate, 2.5-4 × 2.5-3.5(-5) mm, lobes triangular-oblong, less repanded or lobed; glands 4, dark brown, transversely oblong-reniform with a club-shaped horn at each tip. Male flowers many, exserted from involucre. Female flower exserted from cup; ovary smooth, glabrous; styles free, slender and long, caducous; style arms 2-lobed. Capsule trigonous-globose, ca. 10 × 13-17 mm, smooth, glabrous. Seeds ovoid-globose to barrel-shaped, 5-8 × 4-6 mm, brown or gray-brown, with black-brown spots on surface, sharply rugulose; caruncle ca. 1.5 mm wide, yellowish, sessile, easily lost. Fl. Apr-Jul. 2n = 20*.

 

Illustration: http://www.efloras.org/object_page.aspx?object_id=109318&flora_id=2

 

Images and further description: http://www.hear.org/pier/species/euphorbia_lathyris.htm

 

Regards

Tanay

 

 




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tanay bose

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Jul 4, 2010, 12:15:04 AM7/4/10
to Gurcharan Singh, efloraofindia
At Eflora of India the plant that has been identified as Euphorbia dracunculoides doesn't convince me as the description and the Illustration from Flora of China is quite different for this plant.

Description from Flora of China:

 

Euphorbia dracunculoides Lamarck, Encycl. 2: 428. 1788.

Euphorbia lanceolata Sprengel; Tithymalus dracunculoides (Lamarck) Klotzsch & Garcke.

Herbs, annual or short-lived perennial, 10-40 cm tall. Root terete, single, 30-40 cm × 3-8 mm. Stem sometimes branched basally, 3-7 mm thick, branches ascending. Leaves alternate; stipules absent; petiole absent or nearly so; leaf blade linear-oblong, 1-3 cm × 2.5-4 mm, base truncate or subattenuate below, rounded higher up, margin entire, apex rounded or obtuse; lateral veins few, inconspicuous, at acute angle to midrib. Inflorescence an inconspicuous terminal few-rayed cyathium; primary involucral leaves similar to normal leaves, primary rays ca. 3, robust and ascending, dichotomous; cyathophylls 2, similar to normal leaves. Cyathium sessile; involucre broadly campanulate, 2-3 × 3-5 mm, lobes rounded; glands 4, pale brown, crescent-shaped, apex 2-horned, horns light green. Male flowers many, not exserted from involucre. Female flower: ovary exserted from cup, smooth, glabrous; styles free, persistent; style arms 2-lobed. Fruiting peduncle ca. 3 mm; capsule subglobose, ca. 3.5 × 3.5 mm, smooth or obscurely reticulate, glabrous. Seeds ovoid- terete, ca. 2.5 × 1.5-2 mm, gray or dark gray, adaxially striate; caruncle present, stipitate. Fl. Apr-Jul, fr. May-Aug.

Illustration: http://www.efloras.org/object_page.aspx?object_id=109354&flora_id=2

Gurcharan Singh

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Jul 4, 2010, 12:23:20 AM7/4/10
to tanay bose, efloraofindia
Tanay, you are simply great!!!
Thanks for identification


-- 
Dr. Gurcharan Singh
Retired  Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
Phone: 011-25518297  Mob: 9810359089
http://people.du.ac.in/~singhg45/ 

tanay bose

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Jul 4, 2010, 12:29:04 AM7/4/10
to Gurcharan Singh, efloraofindia

Corrigendum:

Kindly read it as Flowers of India instead of Eflora of India.

Sorry for the mistake.

tanay bose

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Jul 4, 2010, 12:29:42 AM7/4/10
to Gurcharan Singh, efloraofindia
Thanks Sir Ji happy to help you !!
Tanay
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