สกุลขี้เหล็ก

สกุลขี้เหล็ก หรือ Senna (มาจาก ภาษาอาหรับ sanā) เป็นสกุลขนาดใหญ่ในวงศ์ Fabaceaeและวงศ์ย่อย Caesalpinioideae พืชในสกุลนี้เป็นพืชท้องถิ่นในเขตร้อน พบในเขตอบอุ่นไม่กี่ชนิด จำนวนสปีชีส์ประมาณ 260 - 350 สปีชีส์ สปีชีส์ของสกุลนี้คือ Senna alexandrina มีประมาณ 50 สปีชีส์ในสกุลนี้ที่เป็นพืชปลูก
== ตัวอย่างสปีชีส์ ==





Senna acclinis  (F.Muell.) Randell
Senna aciphylla  (Benth.) Randell
Senna aculeata  (Benth.) H.S.Irwin & Barneby
Senna alata  (L.) Roxb. - candlebush, Christmas candle, empress candleplant, candlestick tree, ringworm bush, seven-golden-candles
Senna alexandrina Mill. - Alexandrian senna, Indian senna, Tinnevelly senna, true senna
Senna angulata  (Vogel) H.S.Irwin & Barneby
Senna appendiculata  (Vogel) Wiersema (syn. S. australis)
Senna armata  (S.Watson) H.S.Irwin & Barneby
Senna artemisioides  (Gaudich. ex DC.) Randell - grey cassia, leafless cassia, woody cassia, puntybush, silverbush
Senna auriculata  (L.) Roxb. - avaram, Matara-tea, tanner's cassia
Senna aversiflora  (Herbert) H.S.Irwin & Barneby
Senna bacillaris - West Indian showertree
Senna barclayana - pepper-leaf senna, smooth senna, yellow peabush
Senna bicapsularis - rambling senna, Christmas bush, money bush, yellow candlewood
Senna birostris  (Vogel) H.S.Irwin & Barneby
Senna candolleana  (Vogel) H.S.Irwin & Barneby
Senna cardiosperma  (F.Muell.) Randell
Senna caudata  (Standl.) H.S.Irwin & Barneby (Costa Rica, Panama)
Senna cobanensis  (Britton & Rose) H.S.Irwin & Barneby
Senna corymbosa - Argentine senna, Argentine wild sensitive plant
Senna covesii  (A.Gray) H.S.Irwin & Barneby - Coues' cassia, Coves' cassia, desert senna
Senna cumingii  (Hook. & Arn.) H.S.Irwin & Barneby
Senna didymobotrya  (Fresen.) H.S.Irwin & Barneby - candelabra-tree, peanut butter cassia, African senna
Senna domingensis  (Spreng.) H.S.Irwin & Barneby (Cuba, Hispaniola)
Senna fruticosa  (Mill.) H.S.Irwin & Barneby
Senna garrettiana  (Craib) H.S.Irwin & Barneby
Senna gaudichaudii  (Hook. & Arn.) H.S.Irwin & Barneby - climbing cassia, heuhiuhi (Pacific Islands, Queensland) 
Senna hayesiana  (Britton & Rose) H.S.Irwin & Barneby
Senna hebecarpa - American senna, wild senna
Senna hirsuta  (L.) H.S.Irwin & Barneby - woolly senna, woolly wild sensitive plant
Senna italica Mill. - Port Royal senna, dog senna, Italian senna, Spanish senna
Senna ligustrina  (L.) H.S.Irwin & Barneby - privet senna
Senna lindheimeriana  (Scheele) H.S.Irwin & Barneby - velvet-leaf senna, showy senna
Senna macranthera  (Collad.) H.S.Irwin & Barneby
Senna magnifolia  (F.Muell.) Randell
Senna marilandica  (L.) Link - Maryland senna
Senna martiana  (Benth.) H.S.Irwin & Barneby
Senna martiana  (Benth.) H.S.Irwin & Barneby
Senna mexicana - Mexican senna
Senna multiglandulosa  (Jacq.) H.S.Irwin & Barneby - glandular senna, downy senna
Senna multijuga (Rich.) H.S.Irwin & Barneby  - false sicklepod
Senna nicaraguensis  (Benth.) H.S.Irwin & Barneby
Senna nitida  (Rich.) H.S. Irwin & Barneby - hediondilla
Senna notabilis  (F.Muell.) Randell
Senna obtusifolia  (L.) H.S.Irwin & Barneby - coffee-weed, java-bean, American sicklepod
Senna occidentalis  (L.) Link - antbush, coffee-senna, negro-coffee, septicweed, stinkingweed
Senna odorata  (R. Morris) Randall
Senna oligoclada  (F.Muell.) Randell
Senna orcuttii  (Britton & Rose) H.S.Irwin & Barneby - Orcutt's senna, Orcutt's wild sensitive plant
Senna pallida  (Vahl) H.S.Irwin & Barneby
Senna papillosa  (Britton & Rose) H.S.Irwin & Barneby
Senna pendula  (Willd.) H.S.Irwin & Barneby - Easter cassia, valamuerto
Senna pilosior  (B.L.Rob. ex J.F.Macbr.) H.S.Irwin & Barneby Trans-Pecos senna, Trans-Pecos wild sensitive plant
Senna pleurocarpa  (F.Muell.) Randell - stripe-pod cassia
Senna polyphylla  (Jacq.) H.S. Irwin & Barneby - retama prieta
Senna pumilio - dwarf senna
Senna purpusii  (Brandegee) H.S.Irwin & Barneby
Senna racemosa  (Mill.) H.S.Irwin & Barneby - limestone senna
Senna reticulata Willd
Senna ripleyana H.S.Irwin & Barneby - Ripley's senna, Ripley's wild sensitive plant
Senna roemeriana  (Scheele) H.S.Irwin & Barneby - twoleaf senna, Roemer senna
Senna rostrata  (Mart.) H.S.Irwin & Barneby - New Mexico wild sensitive plant
Senna rugosa  (G.Don.) H.S.Irwin & Barneby
Senna scandens
Senna septemtrionalis  (Viv.) H.S.Irwin & Barneby - arsenic-bush, Dooleyweed, laburnum, smooth senna
Senna siamea (Lam.) H.S.Irwin & Barneby - kassodtree, Siamese cassia, Thai cassia, Thailand shower
Senna socotrana
Senna sophera - algarrobilla
Senna spectabilis  (DC.) H.S.Irwin & Barneby - casia amarilla
Senna splendida  (Vogel) H.S.Irwin & Barneby
Senna surattensis  (Burm.f.) H.S.Irwin & Barneby (syn. S. speciosa Roxb.) - glossy shower
Senna sulfurea  (Collad.) H.S.Irwin & Barneby
Senna timoriensis  (DC.) H.S.Irwin & Barneby
Senna tora L. - sickle wild sensitive-plant, sickle senna, foetid cassia
Senna trolliiflora
Senna undulata  (Vahl) H.S.Irwin & Barneby
Senna uniflora
Senna venusta  (F.Muell.) Randell
Senna wislizeni - Wislizenus' senna, shrubby senna
== อ้างอิง ==
== แหล่งข้อมูลอื่น ==
(2005) : Genus Senna. Version 10.01, November 2005. Retrieved 2007-DEC-22.
Senna. USDA PLANTS.