Editing Trillium chloropetalum (section)

==Description==
''Trillium chloropetalum'' is a [[Perennial plant|perennial]], clump-forming [[herbaceous plant]] with a thick underground [[rhizome]]. Like all trilliums, it has a [[Whorl (botany)|whorl]] of three [[bract]]s (leaves) and a single [[trimerous]] flower with 3&nbsp;[[sepal]]s, 3&nbsp;[[petal]]s, two whorls of 3&nbsp;[[stamen]]s each, and 3&nbsp;[[carpel]]s fused into a single [[Ovary (botany)|ovary]] with 3&nbsp;[[Stigma (botany)|stigmas]].{{r|FNA:133668}} Since its [[flower]] has no stalk, ''T.&nbsp;chloropetalum'' belongs to [[Trillium#Subgenus Sessilia|subgenus ''Sessilia'']], the sessile-flowered trilliums. It is one of the largest of all ''Trillium'' species, with a [[Scape (botany)|scape]] (stem) from {{cvt|20|to|70|cm}} long. The bracts are broadly [[Glossary of leaf morphology#ovate|ovate]], {{cvt|7|to|21|cm}} long and {{cvt|7|to|18|cm}} wide, usually with brownish mottling but sometimes unmottled. Petal color is highly variable, typically ranging from pale greenish yellow to greenish bronze (or purplish green) to dark purple. A variety that lacks yellow pigments has petal colors ranging from white to reddish-purple. The flower petals enclose purple stamens, {{cvt|15|to|30|mm}} long, and a purple ovary. Flowering occurs from late February to early April.{{r|FNA:242101986|Jepson eFlora}}{{sfnp|Freeman|1975|pp=52-55}}

In the [[San Francisco Bay Area]], a white-petaled form of ''T.&nbsp;chloropetalum'' is often confused with [[Trillium albidum|''T.&nbsp;albidum'']], which also has white petals. The former is distinguished by the purple pigment in its anther [[Stamen#connective|connective]] tissue, a character lacking in ''T.&nbsp;albidum''.{{sfnp|Freeman|1975|p=51}}