Mazus pumilus  (M. japonicus) Japanese mazus Scrophulariaceae MAPU*; Bx, p (DeCandido 2001); Q, fh (M. Feder p.c.); j (Stalter and Lamont 2002);

  

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Mazus pumilus.Nick Rent.nickrent@plant.siu.edu.www.phytoimages.siu.edu. (Accessed 4/2014).

Mazus pumilus is an annual herb, lax, to 15 cm hairy, often with several stems. 

Leaves opposite, mostly in basal rosette, blade spatula-shaped 1-4 cm long,0.5-1.5 cm wide, often purplish below, margin with a few coarse teeth, stem leaves alternate, smaller. 

Flowers blue-violet with yellow and white markings, to 1 cm long, bilaterally symmetrical, tubular, 2-lipped, upper lip 2-toothed, lower lip 3-toothed, much longer, calyx 5-parted, 0.4-0.5 cm, becoming0.9 cm in fruit; inflorescence a raceme of 4-10 flowers, solitary in axils of alternate bracts (Radford et al. 1968); blooms and fruits May-Nov. 

Fruit a small capsule, shorter than calyx, splitting open at top to release very small seeds. Seed dispersal apparently by raindrop splash in open capsule (Nakanishi 2002). 

Wetland status: FACU-. 

Frequency in NYC: Very infrequent. 

Origin: Asia. 

Habitat: Open areas. Rarely escapes from cultivation. 

Notes: Young, cooked leaves apparently edible. Also has been used medicinally (Fern 2004).