Lecanthus peduncularis (Wall. ex Royle) Wedd.

Herbs perennial, stoloniferous, monoecious or dioecious. Stems often branched, 25-70 cm tall, pubescent distally. Stipules oblong, 3-9 mm, membranous, apex obtuse; petiole 2-8 cm, sparsely pubescent; leaf blade unequal in same pair, ovate to lanceolate, 4-15 × 2-6.5 cm, 3-veined, lateral basal pair often unequal, 1 reaching to middle, anastomosing with adjacent secondary veins before margin, other reaching to tooth of distal margin, lateral veins numerous, sparsely hirsute adaxially, sparsely pubescent on veins abaxially, base slightly obliquely rounded, rarely broadly cuneate, margin dentate-serrate, apex usually acuminate; cystoliths linear, conspicuous on both surfaces. Male inflorescences capitate, receptacle discoid, 8-35 mm in diam.; peduncle 5-30 cm. Female inflorescences on discoid receptacles 5-10 mm in diam.; peduncle 3-12 cm; involucral bracts in 1 or 2 rows, ovate or triangular, ca. 1 mm, membranous. Male flowers pedicellate; perianth lobes 5, unequal, obovate-oblong, corniculate below apex; stamens 5; rudimetary ovary minute, conic. Female flowers shortly pedicellate: perianth lobes (3 or)4(or 5), subequal or lobes by the margin of discoid receptacle unequal, oblong-obovate, 2 lobes corniculate below apex; staminodes conspicuous, elliptic-oblong, ca. 0.8 mm. Achene brownish gray, ellipsoid-ovoid, 0.8-1 mm, U-shaped elevated appendix along dorsi-ventral edge, verrucose. Fl. Jul-Oct, fr. Sep-Nov.

Prostrate to suberect, 3-15 cm tall, succulent, glabrous annual herb. Leaves with 1-5 cm long petiole; lamina somewhat oblique, ovate, 1.5-6.5 x 1-3 cm subcuneate at base, acute-acuminate, serrate, glabrous or glabrescent; stipules membranous, ovate-elliptic, 2.5-4 mm long, entire or serrate. Cluster of male and female flowers on upto 25 cm long filiform peduncle, 6-36 mm across. Flowers minutely pedicellate. Sepals in female, 3, unequal, larger one hooded, the others flat, 1.5-2.5 mm long; in male 4.5, c. 2.5 mm long acuminate. Achene ovoid-elliptic-ovoid, c. 1 mm long, light brown.

Africa, Himalaya, India, Burma, Indo-China, W. & C. China, Taiwan, Java.

Fujian, Guangdong, Guangxi, Hunan, Jiangxi, Sichuan, Taiwan, E and S Xizang, Yunnan [Bhutan, India, Indonesia, Nepal, Pakistan, Philippines, Sri Lanka, Sikkim, Vietnam; Africa].

Distribution: Pakistan (Punjab) Kashmir, India; Sri Lanka, Malaysia, Philippines and tropical Africa.

1200-3200 m

Fl.Per.: July-September.

Shady, moist places in forests, along streams; 1300-2700 m.

Procris peduncularis Wallich ex Royle, Ill. Bot. Himal. Mts. t. 83. 1839; Elatostema ovatum Wight; Lecanthus obtusus (Royle) Handel-Mazzetti; L. sasakii Hayata; L. wallichii Weddell; L. wightii Weddell; Procris obtusa Royle.

Lecanthus peduncularis là loài thực vật có hoa trong họ Tầm ma. Loài này được (Wall. ex Royle) Wedd. mô tả khoa học đầu tiên năm 1869.

假楼梯草（学名：Lecanthus peduncularis）为荨麻科假楼梯草属下的一个种。