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Published In: Species Plantarum 2: 733. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 8/29/2017)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Introduced

 

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Lathyrus sylvestris L. (narrow-leaved vetchling, narrow-leaved everlasting pea)

Map 1764

Plants perennial, with rhizomes, the roots not producing tubers. Stems 50–200 cm long, trailing or climbing, usually branched, glabrous, conspicuously winged, the wings 1–3 mm wide. Leaves with 2 leaflets, the petiole 1.5–3.0 cm long, narrowly to relatively broadly winged winged, the tendrils branched. Stipules 8–14(–23) mm long, 1–3 mm wide, linear to narrowly lanceolate, the basal lobe 3–6 mm long, linear to narrowly oblong-triangular. Leaflets 4–11 cm long, 5–8 mm wide, narrowly lanceolate to narrowly elliptic, angled at the base, angled to a usually sharply pointed tip, the midvein sometimes extended into a minute sharp point at the very tip, glabrous, sometimes slightly glaucous. Inflorescences racemes of 4–9(–12) flowers, the stalk 9–22 cm long, the flower stalks 8–20 mm long. Calyces with the tube 3–4 mm long, glabrous, the lobes 1–4 mm long, the upper 2 short and triangular, the lowermost lobe about twice as long as the upper 2, narrowly triangular, the lateral lobes of the lower lip intermediate in size and shape. Corollas 13–20 mm long, pink to pinkish or reddish purple. Filaments with the fused portion 9–11 mm long, the free portion 3–4 mm long. Ovary glabrous. Fruits 4–7 cm long, 8–9 mm wide, narrowly oblong, flattened, glabrous, 10–20-seeded. Seeds 3.5–4.0 mm long, more or less globose to slightly oblong in outline, sometimes slightly flattened, the surface finely wrinkled, dark brown. 2n=14. June–August.

Introduced, uncommon, known thus far only from Franklin County (native of Europe; introduced and widely scattered in the U.S., Canada). Upland prairies.

Lathyrus sylvestris similar to L. latifolius, but is distinguished mainly by its narrower stipules and smaller flowers. It was first collected in Missouri in 1995 by Doug Ladd as a weed in a constructed prairie at the Shaw Arboretum (now Shaw Nature Reserve).

 
 


 

 
 
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