Chenopodium schraderianum

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  • Warning: Illegal string offset '#value-suffix' in compare_description_element_render_arrays() (line 348 of /var/www/drupal-7-cdm-dataportal/modules/cdm_dataportal/includes/descriptions.inc).
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  • Warning: Illegal string offset '#value' in compare_description_element_render_arrays() (line 348 of /var/www/drupal-7-cdm-dataportal/modules/cdm_dataportal/includes/descriptions.inc).
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  • Warning: Illegal string offset '#value' in compare_description_element_render_arrays() (line 348 of /var/www/drupal-7-cdm-dataportal/modules/cdm_dataportal/includes/descriptions.inc).
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  • Warning: Illegal string offset '#value' in compare_description_element_render_arrays() (line 348 of /var/www/drupal-7-cdm-dataportal/modules/cdm_dataportal/includes/descriptions.inc).
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Chenopodium schraderianum

Diagnosis

Similar taxa. Chenopodium schraderianum is often confused with Chenopodium botrys (23); for differences see the key (couplet 3). See also the closely related Chenopodium pseudomultiflorum (rare casual). For the differences between this species and see under the latter (above).

Biology And Ecology

Hab. A locally common weed of cultivated areas and waste places; 1220-2290 m.

Distribution

E Africa, SW Arabia, Pakistan; locally naturalized in C and E Europe.

Distribution and habitat. Casual in or near gardens; in recent times often brought in with garden seed. Often cultivated in botanic gardens. - D FyL Eliasminde 1870, Sjæ København 1933, 1934, 1991, Snedinge several records 1865-82. N 0/Halden 1827 (garden), Ak Oslo 1940,1946 (filling soil). S Sk Lund 1905, 1926, Välinge 1886, in 1995-2000 also Burlöv, Ivetofta, Knislinge and Österslöv, Bl Karlskrona 1861, Hl Harplinge 1998, BhG Göteborg 1945, 1951, 1994, Vg Kinnarumma 1951, Ulricehamn 1948, Örsås 1961, Srm Värmdö 1950, Vrm Karlstad 1992, Upl Blidö 1985, Solna 1994, 1997, Uppsala 1913. F EH Heinola 1989 (home garden, with garden seed), Lahti 1999 (snow-tip), Tampere 1999 (tip).

Kenya. North Nyeri District: Nyeri, 19 Dee. 1921,Fries 138!; Nairobi, Kirichwa ndogo valley, Jan. 1940, Bally 749!; Nakuru District: Londiani, Dec. 1905, O. S. Baker 348!

Distb. Ul, 2,4; K3-7; Tl-3, 7; from the A.-E. Sudan, Ethiopia and Somaliland southwards through eastern Africa to the Cape and Angola; rarely adventive in Europe; recorded from other parts of the Old and New Worlds, but apparently in error

Uganda. West Nile District: Attiak, War, Apr. 1940, Eggeling 3911!; Kigezi District: Kachwekano Farm, Sept. 1949, Purseglove 3108!; Masaka District: Kyotera, Nov. 1945, Purseglove 1865!

Tanganyika. Bukoba District: Nyaishozi, Dec. 1931, Haarer 2443!; Mbulu District: Mbulumbul, 25 June 1945, Greenway 7445!; Rungwe District: Kyimbila, 23 Sept. 1910, Stolz 292!

Description

Therophyte (summer-annual). Aromatic, up to 1 m, covered by subsessile glands and in addition with some short, eglandular hairs; glands with globose head. Stem subangular, yellowish, reddish or green-striated, erect, sparsely branched in the middle and basal parts only; branches shorter than the main stem. Leaves with petiole up to l(-2) cm; blade elliptic to ovate, up to 8 cm, pinnatifid with 3-5 lobes and a few teeth on each side or sometimes sinuate, pure-green to yellowish-green; base attenuate (sometimes very shortly so); apex obtuse, sometimes apiculate. Bracts sinuate to entire. Inflorescences terminal and axillary, elongated, bracteate for the most part, on the main stem up to 5 cm wide, composed of dichasial cymes. Flowers bisexual; terminal flowers larger than the lateral ones. Tepals 5, free, not contiguous at base, c. 1 x 0.5 mm, elliptic, green or sometimes purple, not whitish in fruit, with a conspicuous, cristate keel and broad membranous margin, with subsessile glands on the margin but otherwise glabrous; apex acute. Stamens 1-5. Stigmas 2, to 0.3 mm. Nut falling without the perianth; pericarp not adherent to the seed. Seed horizontal, orbicular in outline, 0.6-0.8 mm; edge rounded; seed-coat black, shallowly radially striate. - Autumn. [2n=18] Annual up to 1-1-3 m. high, upright; main stem simple or with few rarely many lateral branches, especially near base; plant green, sometimes red-tinged, shortly glandular and pubescent all over, strongly aromatic. Lower and median leaves elliptic to oblong in outline, mostly 1-5 (-8) cm. long and 0-5-3 (-5) cm. wide, mostly obtuse at apex, pinnately divided throughout each side into 3-5 narrow blunt lobes which are entire or with a few blunt teeth and all extend usually to within 2-3 mm. of midrib, glands between veins on lower surface of leaf all sessile (use X 20 lens), not accompanied by hairs; upper leaves progressively smaller and less divided. Inflorescence as in CL Chenopodium procerum (p. 11) but often tending to be smaller. Flowers greenish or red-tinged, minute, 0.5-1 mm. in diameter. Sepals 5, each with a prominent toothed keel outside from near apex to near base,glandular outside, glands all sessile (use X 20 lens). Stamens 1-2. Pericarp easily rubbed or scraped off seed. Seeds (Fig. 2/7,p. 3) black or nearly so, somewhat glossy, 0-7- 0.8 mm. in diameter,bluntly and not prominently keeled; testa under microscope with very minute shallow contiguous rounded or angular pits.

Discussion

A number of varieties and forms have been recognized under Chenopodium schraderianum , notably by Murr in Bull. Herb. Boiss" ser . 2, 4: 990-991 (1904) , Aschers. & Graebn., Syn. Mitteleur. FI. 5 (1): 24 (1913) , and Aellen in F.R. 24: 345-7 (1928). these have been summarized by Hauman in F.C.B. 2: 6 (1951) . None has so far been recorded for East Africa, although doubtless they occur. Hauman’s view that these are nothing more than states due to environment, or merely different stages in growth and development, is willingly followed here.

Other

Chenopodium foetidum Schrad. D Afrikansk Gåsefod. F afrikansavikka. N afrikamelde. S drakmålla. Chenopodium schraderianum Syn. Chenopodium foetidum

Citation

Schultes, Syst. Veg. 6: 260 (1820).
Bak. & C. B. Cl. in F.T.A. 6 (1): 80 (1909)
Syst. Veg. 6: 260 (1820)
Brenan in K.B. 1950: 131 (1950)
Hauman in F.C.B. 2: 4 (1951).

Not marked-up

24. Fig. 3L 7. ,