Orthosiphon aristatus (Blume) Miq.

Suddee, S., A. J. Paton, & Parnell, J. (2005). Taxonomic Revision of Tribe Ocimeae Dumort. (Lamiaceae) in Continental South East Asia III. Ociminae. Kew Bulletin, 60(1), 3-75. Retrieved from http://www.jstor.org/stable/4110885

Type

Java, Batavia, Blume 1091 (lectotype L!; isolectotypes L!, NY!).

Morphology General Habit

Erect or ascending perennial herb up to 2.5 m tall, rootstock woody

Morphology Stem

Stems quadrangular or round- quadrangular, glabrous to pubescent, branched, old stem sometimes whitish-grey, epidermis peeling

Morphology Leaves

Leaves sessile, subsessile or petiolate, chartaceous, ovate or ovate-lanceolate, 7 - 120 x 7 - 60 mm, apex acute or acuminate, base cuneate or truncate, margin serrate or crenate-serrate, with sessile glands on both sides, pubescent on nerves otherwise glabrous or glabrescent, puberulous to pubescent all over; petioles up to 30 mm long, pubescent

Morphology Reproductive morphology Inflorescences

Inflorescence terminal, up to 30 cm long; axis pubescent; bracts sessile, subtending 2 - 3 flowers, forming a small apical coma, mostly persistent, ovate to broadly ovate, up to 5 mm long, sometimes very short, wider than long, shorter than the pedicel in flower and fruit, acute, acuminate, cuspidate, apiculate or truncate at apex, margin ciliate, adaxial glabrous or glabrescent, abaxial pubescent with sessile glands; pedicels 3 - 5 mm long in flower, 4 - 6 mm long in fruit, pubescent

Morphology Reproductive morphology Flowers Calyx

Calyx 3 - 8 mm long at anthesis, 6 - 15 mm long in fruit; posterior lip orbicular, ovate or obovate, apex rounded, acute or obtuse, mostly glabrous on both sides, occasionally pubescent on nerves on inner side; anterior lip with median teeth subulate, longer than posterior, lateral much shorter than median teeth, varying from truncate-apiculate to shortly cuspidate; tube pubescent with sessile glands outside, sometimes constricted above ovary and widely expanded at throat

Morphology Reproductive morphology Flowers Corolla

Corolla blue or purple, 12 - 35 mm long; posterior lip 3-lobed, midlobe broadest, emarginate; anterior lip oblong, ± equal in length to the posterior, concave, more or less straight; tube slender, 10 - 20 mm long, pubescent, not or slightly dilated at throat

Morphology Reproductive morphology Flowers Androecium Stamens

Stamens far exserted, anterior slightly longer, more than twice as long as anterior corolla lip

Morphology Reproductive morphology Flowers Gynoecium Style

Style slightly longer than anterior stamens, clavate and slightly cleft at apex

Morphology Reproductive morphology Flowers Disc

Disc with anterior side well-developed, obtuse or truncate at apex, equal to or exceeding ovary

Morphology Reproductive morphology Fruits

Nutlets oblong or ellipsoid, 1.5 - 2 mm long, reticulate, sometimes producing mucilage when wet.