大花黃槐

大花黃槐學名Senna × floribunda (Cav.) Irwin & Barneby、Chamaesenna laevigata (Willd.) Pittier、Adipera laevigata (Willd.) Britton et Rose、Chamaefistula laevigata (Willd.) G. Don、Adipera bicolor Britton & Rose、Adipera arsenei Britton & Rose、Cassia corymbosa var. plurijuga Benth.、Cassia floribunda var. herbertiana (Lindl.) Vogel、Cassia grandiflora Desf.、Cassia herbertiana Lindl.、Chamaefistula floribunda var. herbertiana (Lindl.) Vogel、Chamaefistula floribunda (Cav.) G. Don ，英文名Large-flower Glossyshower Senna，豆科蘇木亞科決明(黃槐、旃那、番瀉決明)屬落葉性灌木或小喬木植物，又稱大葉黃槐、多花黃槐、多花槐、多花決明、繁花決明、印度咖啡豆，原產於阿根廷，株高一至四公尺，莖幹直立，具多數分枝，上部枝葉繁茂，小枝四稜形，小枝直立或水平伸展，光滑，近無毛，中空，內常有膜質橫膈，葉互生，偶數羽狀複葉，小葉約三至五對，小葉卵形、長橢圓形、卵狀長橢圓形，端部長漸尖、銳尖，基部鈍狀，葉全緣，小葉長四至十一公分，寬二至四公分，葉面濃綠、深綠色，葉緣不帶橘黃色，光滑無毛，葉背面粉白色，羽狀脈，葉脈中肋明顯，每對小葉或大多數小葉間皆有腺體，腺體圓柱形、紡錘形，具托葉，具葉柄與小葉柄，兩性花，總狀花序，具花約四至十枚，頂生或腋生，生於枝條先端或葉腋，花序長四至十公分，光滑無毛，花梗長八至二十五公釐，花萼筒狀，合生，綠色，萼筒短，先端五裂，覆瓦狀排列，裂片(萼片)長橢圓形，先端鈍，光滑無毛或略有毛茸，花冠蝶形，花鮮黃色，花瓣五枚，約略等長，長橢圓形、卵狀長橢圓形，長十五至二十公釐，先端鈍狀，具柄，覆瓦狀排列，離生，雄蕊十枚，完全雄蕊七枚，離生，花藥縫線無毛，雌蕊心皮一枚，柱頭頭狀，子房上位，子房一室，邊緣胎座，莢果，長筒形、圓柱狀，肥碩如豆，長六至十公分，熟時褐、黃褐色，沿腹面縫線開裂，二瓣裂，種子六至十二枚，有光澤，熟後黑褐色。

大花黃槐(Senna × floribunda)亦有稱之「光葉決明」，光葉決明學名Cassia × floribunda 'Tige'，是園藝栽培種。

「決明屬」種檢索表：
A.葉柄及小葉軸皆不具腺體。-----★鐵刀木
A.葉柄及小葉軸其一具腺體。
▁B.葉柄具腺體。
▁▁C.植株密被粗毛。-----★毛決明
▁▁C.植株近無毛。
▁▁▁D.莢果圓柱形。-----★大花黃槐
▁▁▁D.莢果扁平。-----★望江南
▁B.小葉軸具腺體。
▁▁C.小葉4-6對。-----★黃槐
▁▁C.小葉3對。-----★決明

常見決明(Senna)屬的品種有：
------------------------------------------------
Senna acclinis
Senna aciphylla
Senna acillaris
Senna aculeata
Senna acutifolia(亞歷山大決明)
Senna agnes(神黃豆)
Senna alata(翅果鐵刀木、翅莢決明、翼柄決明)
Senna alexandrina(旃那)
Senna angulata
Senna aphylla
Senna appendiculata
Senna armata
Senna artemisioides
Senna atomaria
Senna auriculata(耳葉決明、麻榻勒茶)
Senna aversiflora
------------------------------------------------
Senna bakeriana(花旗木)
Senna bauhinioides
Senna bicapsularis(金葉黃槐)
Senna bicapsularis 'California Gold'
Senna bicapsularis 'Worley's Butter Cream'
Senna birostris
------------------------------------------------
Senna calycioides
Senna cana
Senna candolleana
Senna cobanensis
Senna confinis
Senna coronilloides
Senna corymbosa(繖房決明)
Senna costata
Senna covesii
Senna cumingii
------------------------------------------------
Senna didymobotrya(長穗決明、複總望江南)
Senna didymobotrya 'Popcorn Cassia'
Senna durangensis
------------------------------------------------
Senna fistula(阿勃勒、豬腸豆、臘腸樹)
Senna floribunda(大花黃槐)
Senna fruticosa(大葉決明、四葉黃槐)
------------------------------------------------
Senna gardneri
Senna gaudichaudii
Senna glauca(粉葉決明)
Senna glutinosa
Senna grandis(紅花鐵刀木)
------------------------------------------------
Senna hebecarpa
Senna hirsuta(毛決明、毛莢決明)
Senna holosericea
Senna holwayana
------------------------------------------------
Senna italica
------------------------------------------------
Senna javanica(爪哇旃那、節莢決明、粉花決明)
------------------------------------------------
Senna latifolia
Senna leptophylla(狹葉決明)
Senna leschenaultiana(大葉山扁豆、短葉決明)
Senna ligustrina
Senna lindheimeriana
------------------------------------------------
Senna macranthera
Senna marilandica
Senna martiana
Senna mexicana
Senna mimosoides(山扁豆、含羞草決明)
Senna mollissima
Senna multiglandulosa
Senna multijuga(密葉決明、小葉黃槐)
------------------------------------------------
Senna nicaraguensis
Senna nitida
Senna nodosa(節果決明)
Senna nomame(豆茶決明)
Senna notabilis
------------------------------------------------
Senna obtusifolia(草決明)
Senna occidentalis(望江南)
Senna odorata
Senna oxyphylla
------------------------------------------------
Senna pallida
Senna pendula
Senna petersiana
Senna pilifera
Senna pinheiroi
Senna planitiicola
Senna pleurocarpa
Senna podocarpa(羅漢決明)
Senna polyantha
Senna polyphylla(沙漠黃槐)
Senna pumila(柄腺山扁豆)
Senna purpurea
Senna purpusii
------------------------------------------------
Senna quinquangulata
------------------------------------------------
Senna racemosa
Senna reniformis
Senna reticulata
Senna roemeriana
------------------------------------------------
Senna septemtrionalis
Senna siamea(鐵刀木)
Senna silvestris
Senna singueana
Senna sophera(茳芒決明、槐葉決明)
Senna spectabilis(美麗決明)
Senna splendida
Senna stipulacea
Senna sulfurea(黃槐、黃槐決明)
------------------------------------------------
Senna tapajozensis
Senna timoriensis(帝汶決明)
Senna tora(決明、小決明)
------------------------------------------------
Senna undulata
Senna uniflora
------------------------------------------------
Senna velutina
Senna venusta
Senna versicolor
Senna viarum
Senna viminea
------------------------------------------------
Senna wislizeni
------------------------------------------------
Senna × floribunda(大花黃槐)
Senna × nealiae(彩虹阿勃勒)
------------------------------------------------
Senna 'Species'
------------------------------------------------