Lactuca serriola L., Cent. Pl. 29 1756. (Syn: Lactuca altaica Fisch. & C.A.Mey.; Lactuca augustana All.; Lactuca coriacea Sch.Bip.; Lactuca dubia Jord.; Lactuca integrata (Gren. & Godr.) A.Nelson (Unresolved); Lactuca scariola L.; Lactuca scariola var. integrata Gren. & Godr.; Lactuca scariola var. integrifolia (Bogenh.) G. Beck; Lactuca sylvestris Lam.; Lactuca tephrocarpa K.Koch); , Tall prickly herb reaching 1.5 m, branched, prickly towards base; leaves sessile, pinnatifid with toothed segmrnts pointing downwards, prickly on midrib and nerves beneath, upper leaves stem-clasping with arrow-shaped base; heads yellow, 9-12 mm in diam., in long panicles with spreading branches; involucre bracts oblong; achene brown nearly 3 mm long with slender almost as long longer beak, pappus hairs white. .
syn: Lactuca scariola L.; Lactuca augustana All. Common name: Prickly lettuce Tall prickly herb reaching 1.5 m, branched, prickly towards base; leaves sessile, pinnatifid with toothed segmrnts pointing downwards, prickly on midrib and nerves beneath, upper leaves stem-clasping with arrow-shaped base; heads yellow, 9-12 mm in diam., in long panicles with spreading branches; involucre bracts oblong; achene brown nearly 3 mm long with slender almost as long longer beak, pappus hairs white. Very common in Kashmir valley in wastelands, borders of fields and road sides, photographed from Balgarden and University Campus in August. Very beautiful set of photographs. esp Lactuca-scariola-Balgarden-Kashmir-3-DSC06662.jpg and the one showing dehiscence. Never seen something like this before.Thank you… for mentioning the word. I was waiting for someone to mention it so that I can share my appreciation too as I did not know how to describe it. Thanks a lot … The last photograph is very useful for this group of asteraceae. In fact one can identify the plant only from this. Here is my paper on this published in 1972. Thank you Sir ji for the paper. Very nice paper on key to the genera based on achene characters. And yes today I learned a new word in Botany ‘achene’ meaning single-seeded fruits . …, interestingly it is not achene in the real sense, but a term very commonly used in this family. The fruit type is actually cypsella (formed from two united carpels with inferior ovary, dry fruit containing single seed). The real achene is found in Ranunculaceae in Ranunculus, Anemone, Clematis, etc. carpels are free and single seeded dry fruit is formed from single carpel. In other genera, Delphinium, Aquilegia, etc., each free carpel contains more than one ovule, and fruit matures into follicle. Very nice pappus.. nice to be able to hold and it not fly away from the slight breeze created by breathing …
ASTERACEAE Fortnight Part 3-Ligulate Heads: Lactuca serriola from Uttarakhand_DSR_12 : Attachments (3). 3 posts by 2 authors. Very nice illustrative photographs. I liked the last picture of the achene showing different parts clearly. Thank you …. Achenes are important in most of the cases for identification in Asteraceae. Yes … Here is my old paper on that 1972-Achene-morphology.PDF
Asteraceae Fortnight Part 3-Ligulate Heads (plus Misc.) Lactuca serriola from Kashmir and California-GS25 : Attachments (6). 3 posts by 3 authors. syn: Lactuca scariola L.; Lactuca augustana All. Common name: Prickly lettuce Tall prickly herb reaching 1.5 m, branched, prickly towards base; leaves sessile, pinnatifid with toothed segmrnts pointing downwards, prickly on midrib and nerves beneath, upper leaves stem-clasping with arrow-shaped base; heads yellow, 9-12 mm in diam., in long panicles with spreading branches; involucre bracts oblong; achene brown nearly 3 mm long with slender almost as long longer beak, pappus hairs white. Very common in Kashmir valley in wastelands, borders of fields and road sides, photographed from Balgarden and University Campus in August. Thanks for showing this sir.. I think this is also making invasion in our area, could get a similar plant from Panipat and Kaithal.. will share soon, though I could not get the open heads… This species in Pantnagar has less lobation in lamina.     PLANT ID from PU, CHANDIGARH : 3 posts by 3 authors. Attachments (4) Habit: A Herb of height ~5.5 ft with spirally arranged leaves Habitat: Roadside Location : Panjab university, Chandigarh Date: 7/6/2016 Please check for Lactuca serriola (Asteraceae). Thanks, …, for the Id. It seems to match with images at Lactuca serriola
SK384 18FEB-2017:ID : 3 posts by 2 authors. Attachments (3) Location: Shanghai , China Altitude: 100-200 ft. Date: 29 October 2014 Any species under Cichorieae (pl. see the comparative images)? Chondrilla sp. ??
Attachments (10). 3 posts by 2 authors. This fast spreading weed was shot from near Panipat in month of May.. I hope this is Lactuca serriola.. the plant bears small spines all over the stem and leaves, contains latex, I could not capture open heads, perhaps they open for a short period.. please validate/correct me.. I think yes it is Looks matching Species Lactuca serriola L. ! .          Prickly Lettuce (Lactuca serriola ) from Srinagar: 8 images. Am posting some photos of what I think is Lactuca serriola plants growing in a field in Rawathpora Srinagar. Habitat : Wild more than 1.5 meters high Habit : Herb Leaves Pinnatifid with fine spines on the margin and a row of spines along the midrib. In sun the leaves twist keeping margins upright and leaf blade parallel to the rays of light (see photo) hence the name Compass Plant (Wikipedia). It is the closest wild relative of the cultivated lettuce L.sativa. Note: The fruit was photographed in Sept 23 and Inflorescence in Aug 23. All the rest are from July 2024. All photos under CC License (Attribution only required) . References: |
Lactuca serriola
Updated on December 24, 2024