Oberpr. Archibaccharis Heering Archidasyphyllum (Cabrera) P.L.Ferreira, Saavedra & Groppo Archiserratula L.Martins Arctium L. – burdock Arctogeron DC. Arctotheca J.C.Wendl. – capeweed Arctotis L. Argentipallium Paul G.Wilson Argyranthemum Webb – dill daisy × Argyrautia Sherff Argyroglottis Turcz. Argyrotegium J.M.Ward & Breitw. Argyroxiphium DC. – silversword Aristeguietia R.M.King & H.Rob. Arnaldoa Cabrera Arnica L. – arnica Arnicastrum Greenm. Arnoglossum Raf. – Indian plantain Arnoseris Gaertn. Arrhenechthites Mattf. Arrojadocharis Mattf. Arrowsmithia DC. Artemisia L. – tarragon, sagebrush, sagewort, wormwood, mugwort Artemisiopsis S.Moore Asanthus R.M.King & H.Rob. – brickellbush Ascidiogyne Cuatrec. Askellia W.A.Weber Aspilia Thouars Asplundianthus R.M.King & H.Rob. Astartoseris N.Kilian, Hand, Hadjik., Christodoulou & Bou Dagh. Aster L. – aster Asteridea Lindl. Asteriscus Mill. Asterothamnus Novopokr. Astranthium Nutt. – western daisy Athanasia L. Athrixia Ker Gawl. Athroisma DC. Atractylis L. Atractylodes DC. Atrichantha Hilliard & B.L.Burtt Atrichoseris A.Gray Austrobrickellia R.M.King & H.Rob. Austrocritonia R.M.King & H.Rob. Austroeupatorium R.M.King & H.Rob. Austroliabum H.Rob. & Brettell Austrosynotis C.Jeffrey Axiniphyllum Benth. Ayapana Spach Ayapanopsis R.M.King & H.Rob. Aynia H.Rob. Aztecaster G.L.Nesom B List of genera is from Plants of the World Online unless otherwise cited. Baccharis L. – baccharis Baccharoides Moench Baculellum L.V.Ozerova & A.C.Timonin × Bacurio Gideon F.Sm. & Figueiredo Badilloa R.M.King & H.Rob. Baeriopsis J.T.Howell Bahianthus R.M.King & H.Rob. Bahiopsis Kellogg Baileya Harv. & A.Gray – desert marigold Bajacalia Loockerman, B.L.Turner & R.K.Jansen Balduina Nutt. – honeycombhead Balladonia P.S.Short Balsamorhiza Hook. – balsamroot Baltimora L. – baltimora Barkleyanthus H.Rob. & Brettell – willow ragwort Barnadesia Mutis ex L.f. Barrosoa R.M.King & H.Rob. Bartlettia A.Gray Bartlettina R.M.King & H.Rob. Basedowia E.Pritz. Bathysanthus G.L.Nesom Batopilasia G.L.Nesom & R.D.Noyes Bebbia Greene – sweetbush Bechium DC. Bedfordia DC. Bejaranoa R.M.King & H.Rob. Bellida Ewart Bellis L. – daisy Bellium L. Belloa J.Rémy Benitoa D.D.Keck Berardia Vill. Berkheya Ehrh. Berlandiera DC. – greeneyes Berroa Beauverd Bertilia Cron Berylsimpsonia B.L.Turner Bethencourtia Choisy Bidens L. – beggartick, sticktight, Spanish needles Bigelowia DC. – rayless goldenrod Bishopanthus H.Rob. Bishopiella R.M.King & H.Rob. Bishovia R.M.King & H.Rob. Blainvillea Cass. Blakiella Cuatrec. Blanchetia DC. Blennosperma Less. – stickyseed Blennospora A.Gray Blepharipappus Hook. Blepharispermum DC. Blepharizonia (A.Gray) Greene Blumea DC. – false oxtongue Boeberastrum Rydb. Boeberoides (DC.) Strother Bolandia Cron Bolanosa A.Gray Boltonia L'Hér. – doll's daisy Bombycilaena (DC.) Smoljan. Borrichia Adans. – seaside tansy Bothriocline Oliv. ex Benth. Brachanthemum DC. Brachionostylum Mattf. Brachyclados D.Don Brachyglottis J.R.Forst. & G.Forst. Brachylaena R.Br. Brachyscome Cass. Brachythrix Wild & G.V.Pope Bradburia Torr. & A.Gray Brenandendron H.Rob. Brickellia Elliott