Asperula, commonly known as woodruff, is a genus of flowering plants in the family Rubiaceae. It contains 194 species and has a wide distribution area from Europe, northern Africa, temperate and subtropical Asia to Australasia. Species Asperula abbreviata (Halacsy) Rech.f. Asperula abchasica V.I.Krecz. Asperula accrescens Klokov Asperula acuminata I.Thomps. Asperula affinis Boiss. & A.Huet Asperula albiflora Popov Asperula ambleia Airy Shaw - Stiff woodruff Asperula apuana (Fiori) Arrigoni Asperula arcadiensis Sims Asperula aristata L.f. Asperula arvensis L. - Blue woodruff Asperula assamica Meisn. Asperula asterocephala Bornm. Asperula asthenes Airy Shaw - Trailing Woodruff Asperula azerbaidjanica Mam Asperula badachschenica Pachom. Asperula baenitzii Heldr. ex Boiss. Asperula balchanica Bobrov Asperula baldaccii (Halacsy) Ehrend. Asperula beckiana Degen Asperula biebersteinii V.I.Krecz Asperula boissieri Heldr. ex Boiss. Asperula borbasiana (Korica) Korica Asperula bornmuelleri Velen. ex Bornm. Asperula boryana (Walp.) Ehrend. Asperula botschantzevii Pachom. Asperula brachyantha Boiss. Asperula brachyphylla Trigas & Iatrou Asperula breviflora Boiss. Asperula brevifolia Vent. Asperula bryoides Stapf Asperula calabra (Fiori) Gavioli Asperula capitata Kit. ex Schult. Asperula capitellata Hausskn. & Bornm. Asperula carpatica Morariu Asperula charophyton Airy Shaw - Strapleaf woodruff Asperula chlorantha Boiss. & Heldr. Asperula ciliatula Pachom. Asperula cilicia Hausskn. ex Ehrend. Asperula comosa Schönb.-Tem. Asperula conferta Hook.f. - Common woodruff Asperula congesta Tschern. Asperula crassifolia L. Asperula crassula Greuter & Zaffran Asperula cretacea Willd. ex Roem. & Schult. Asperula cristata (Sommier & Levier) V.I.Krecz Asperula cunninghamii Airy Shaw & Turrill - Twining woodruff Asperula cymulosa (Post) Post Asperula cynanchica L. - Squinancywort Asperula cypria Ehrend. Asperula cyrenaica (E.A.Durand & Barratte) Pamp. Asperula czukavinae Pachom. & Karim Asperula dasyantha Klokov Asperula deficiens Viv. Asperula diminuta Klokov Asperula doerfleri Wettst. Asperula elonea Iatrou & Goergiadis Asperula euboea (Ehrend.) ined. Asperula euryphylla Airy Shaw & Turrill Asperula fedtschenkoi Ovcz. & Tschernov Asperula fragillima Boiss. & Hausskn. Asperula friabilis Schönb.-Tem. Asperula galioides M.Bieb. Asperula garganica Huter Asperula gemella Airy Shaw & Turrill - Twin-leaved bedstraw Asperula geminifolia F.Muell. Asperula glabrata Tschern. Asperula glareosa Ehrend. Asperula glomerata (M.Bieb.) Griseb. Asperula gobica ined. Asperula gorganica Schönb.-Tem. & Ehrend. Asperula gracilis C.A.Mey. Asperula graveolens M.Bieb. ex Schult. & Schult.f. Asperula gunnii Hook.f. - Mountain woodruff Asperula gussonei Boiss. - Alpine Woodruff Asperula haphneola O.Schwarz Asperula hercegovina Degen Asperula hexaphylla All. Asperula hirsuta Desf. Asperula hirta Ramond Asperula hoskingii I.Thomps. Asperula icarica Ehrend. & Schönb.-Tem. Asperula idaea Halacsy Asperula inopinata Schönb.-Tem. Asperula insignis (Vatke) Ehrend. Asperula insolita Pachom. Asperula intersita Klokov Asperula x jordanii E.P.Perrier & Songeon