สกุลขี้เหล็ก

**สกุลขี้เหล็ก** หรือ ***Senna*** (มาจาก ภาษาอาหรับ *sanā*) เป็นสกุลขนาดใหญ่ในวงศ์ Fabaceaeและวงศ์ย่อย Caesalpinioideae พืชในสกุลนี้เป็นพืชท้องถิ่นในเขตร้อน พบในเขตอบอุ่นไม่กี่ชนิด จำนวนสปีชีส์ประมาณ 260 - 350 สปีชีส์ สปีชีส์ของสกุลนี้คือ *[[Senna alexandrina]]* มีประมาณ 50 สปีชีส์ในสกุลนี้ที่เป็นพืชปลูก
## ตัวอย่างสปีชีส์
[thumb|right|''[Senna aversiflora*]]
[[ไฟล์:Starr 020815-0041 Senna didymobotrya.jpg|thumb|right|*Senna didymobotrya*]]
[[ไฟล์:Senna lindheimeriana branch.jpg|thumb|right|*Senna lindheimeriana*]]
[[ไฟล์:Senna multiglandulosa 5.jpg|thumb|right|*Senna multiglandulosa*]]
[[ไฟล์:Starr 020501-0002 Senna surattensis.jpg|thumb|right|*Senna surattensis*]]

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

== อ้างอิง ==


== แหล่งข้อมูลอื่น ==


* 
*  (2005) : [http://www.ildis.org/ Genus *Senna*]. Version 10.01, November 2005. Retrieved 2007-DEC-22.
* [http://plants.usda.gov/java/profile?symbol=SENNA *Senna''.] USDA PLANTS.