Achyrospermum wallichianum (Benth.) Benth. ex Hook.f.

Habit

Herbs

Family Description

Herbs,subshrubs or shrubs,often aromatic.Stems usually quadrangular.Leaves simple,rarely pinnatisect or compound,opposite and usually decussate or rarely whorled.Stipules absent.Inflorescence of cymes,often condensed,paired and appearing as whorls(verticillasters),in spike-like,capitate or paniculate arrangements,ocassionally cymes pedunculate and lax,forming a panicle.Bracts caducous or persistent;bracteoles present or absent.Flowers usually hermaphrodite.Calyx usually 5-lobed,bilabiate to regular or oblique.Corolla gamopetalous,regular to zygomorphic,4-5 lobed.Stamens 4,equal or varying in length or 2 with 2 staminodes;anthers 1-or-2-celled.Ovary superior,4-lobed,becoming 4-celled,each locule containing 1 basally attached ovule.Style completely gynobasic(arising from base of ovary between lobes) or only partially gynobasic,2-lobed or rarely punctate.Fruit of 4,usually dry,one-seeded nutlets,included in persistent calyx

Genus Description

Suffruscent herbs.Stems terete,ascending to erect.Leaves with lamina decurrent on petiole,margins serrate.Inflorescence terminal and axillary,spike-like;verticillasters many-flowered,condensed.Calyx weakly bilabiate,campanulate;teeth 5,upper lip 3-toothed.Corolla bilabiate;tube straight,annulate;upper lip bifid;lower lip 3-lobed,longer than upper,median lobe larger than laterals.Stamens 4,ascending,subequal,not exserted beyond upper lip;anthers 2-celled.Style bifid.Nutlets obovoid,with scaly processes on ventral surface and apex,scar small.

Species description

Stems 28-100cm,pubescent to glabrescent.Leaves elliptic-ovate,8.5-14.5 x 3.8-6.5cm,shortly acuminate,base cuneate with lamina extending along petiole,margins serrate,upper surface appressed pilose,lower surface pubescent on veins otherwise glabrous;petiole 1-3.5cm.Inflorescences 4-9 x c 2.5cm.Calyx 7-9mm;teeth triangular-ovate,those of upper lip 1.5mm,those of lower lip 3.5mm.Corolla white with pink markings,pink or pale,9-12mm;tube 7-10.5mm.Nutlets 2.5 x 1.7mm.

Samtse, Phuentsholing, Chukha, Gelephu, Deothang. 610-1520m.