Serek clearweed (Pilea angulata)

Serek clearweed (Pilea angulata) is a species of plant in the Urticaceae, herbaceous perennial, erect stem, up to 100 cm high, succulent, square or cylindrical, enlarged in the center of the internode, bright green or reddish in color, forming colonies in the shade.

P. angulata has stipules that are immediately deciduous or subpersistent, green or brown, oblong, 7-25 mm long. The stalk is 2-9 cm long. The leaf blade is 7-23 cm long, 3-7 cm wide and is ovate or ovate-elliptic or oblong-lanceolate.

The surface is wavy, pale green on the underside, dark green on the top. The three main veins are central and linear. Base contact, tapered tip and rough serrated edges. Paired inflorescence, male is dense cyme paniculata, 1-2 cm. Females 2-5 cm.

TAXON

Kingdom: Plantae
Phylum: Tracheophyta
Subphylum: Angiospermae
Class: Magnoliopsida
Order: Rosales
Family: Urticaceae
Genus: Pilea Lindl. in Coll. Bot.: t. 4 (1821)
Species: Pilea angulata Blume) Blume in Mus. Bot. 2: 55 (1856)
Subspecies: Pilea angulata subsp. angulata, Pilea angulata subsp. latiuscula C.J.Chen, Pilea angulata subsp. petiolaris (Siebold & Zucc.) C.J.Chen

HOMOTYPIC SYNONYMS

Adicea angulata (Blume) Kuntze in Revis. Gen. Pl. 2: 622 (1891)
Urtica angulata Blume in Bijdr. Fl. Ned. Ind.: 494 (1826)

PUBLICATIONS

Girmansyah, D. & al. (eds.) (2013). Flora of Bali an annotated checklist: 1-158. Herbarium Bogorensis, Indonesia.

Iwatsuki, K., Boufford, D.E. & Ohba, H. (eds.) (2006). Flora of Japan IIa: 1-550. Kodansha Ltd., Tokyo.

Lê, T.C. (2003). Danh lục các loài thực vật Việt Nam 2: 1-1203. Hà Nội : Nhà xuất bản Nông nghiệp.

Wu, Z. & Raven, P.H. (eds.) (2003). Flora of China 5: 1-505. Science Press (Beijing) & Missouri Botanical Garden Press (St. Louis).

VERNACULAR NAME

Chinese (simplified): 圆瓣冷水花
Chinese (traditional): 長柄冷水麻
English: Serek clearweed
Indonesia: Serek
Japanese: ミズボウシ
Java: Serek

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