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IRIDACEAE IRIS FAMILY

Peter Goldblatt, except as noted

[(Annual), shrub], perennial herb generally from [bulb], corm, or rhizome. Stem: generally erect, generally ± round in ×-section. Leaf: generally basal (few cauline), 2-ranked, ± sword-shaped, blade edge-wise to stem, with midvein or not; bases overlapped, sheathing. Inflorescence: generally ± terminal; spikes, umbel-like cymes, or flowers 1; flowers in spikes or 1 subtended by 2 subopposite flower bracts; umbel-like cymes enclosed by 2 subopposite, generally large, leaf-like inflorescence bracts, including various flower bracts. Flower: bisexual (unisexual), radial, with stamens erect, enclosing style, or bilateral, with stamens, style to 1 side, stamens not enclosing style; perianth radial, parts free or generally fused into tube above ovary, generally petal-like, in 2 series of 3, outer ± like inner (or not, in Iris, parts in that genus called sepals, petals), upper ± like lower or not; stamens 3, attached at base of outer 3 perianth parts or in tube, generally free; ovary inferior [(superior)], [(1)]3-chambered, placentas axile [(parietal)], style 1, branches 3, entire to 2-branched, thread- or petal-like with stigma abaxial, proximal to tip. Fruit: capsule, loculicidal. Seed: few to many.
± 65 genera, ± 2050 species: worldwide, especially Africa; many cultivated (e.g., Crocus, Dietes, Freesia, Gladiolus, Iris, Sisyrinchium). [Goldblatt & Manning 2008 The Iris Family: Natural History and Classification. Timber Press] Gladiolus italicus Mill., Gladiolus tristis L. are urban weeds. Sparaxis grandiflora (D. Delaroche) Ker Gawl., Sparaxis tricolor (Schneev.) Ker Gawl. are waifs. —Scientific Editor: Thomas J. Rosatti.

Key to Iridaceae

ROMULEA
Perennial herb; corm rounded, generally asymmetric, cover ± woody, split at top into several teeth. Leaf: slender, ± round or widely elliptic in ×-section, generally 4-grooved. Inflorescence: flowers 1 on erect, basal peduncle, flower bracts green, generally with membranous margins, inner forked at tip. Flower: radial; perianth generally funnel-shaped, tube generally << lobes; style generally ± = stamens, branches deep-divided. Seed: many.
± 90 species: especially Africa, Mediterranean. (Romulus, legendary co-founder of Rome) [Manning & Goldblatt 2001 Adansonia ser. 3 23:59–108]
Unabridged references: [DeVos 1983 J S African Bot, Suppl vol. 9]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 1 2014
Citation for this treatment: [Author of taxon treatment] 2013. Romulea, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=9440, accessed on Sep 1 2014

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