Iris sibirica ‘Caesar’s Brother’
Blue Siberian iris
Siberian iris is a perennial native to central and eastern Europe and central Asia. This cultivar is popular among gardeners.
Plants: 2–3½″ (5–8.9 cm) tall.
Leaves: Narrow, straplike leaves are 1–2′ (30–60 cm) long and 1–2″ (2.5–5 cm) wide.
Flowers: Striking deep violet-blue flowers are 3–4″ (7.6–10 cm) across.
Fruits: A stubby roundly triangular seed capsule is 1–1¾ ⨉ ⅜–½″ (3–4.5 ⨉ 1–1.3 cm). Each capsule contains two rows of seeds, which are thin, flat, and shaped like a capital ‘D.’ Each seed is dark brown, and ⅛ ⨉ ⅛″ (3 ⨉ 5 mm).
Habitats: The natural species are found in damp woodlands, wet meadows, grasslands or pastures, reed swamps by lakes, and beside streams.
Online References:
6/11/2008 · Tom and Susan’s, Pepperell, Massachusetts · ≈ 2½ × 1½′ (73 × 54 cm) 
6/11/2008 · Tom and Susan’s, Pepperell, Massachusetts · ≈ 4½ × 4″ (11 × 10 cm) 
5/27/2010 · Tom and Susan’s, Pepperell, Massachusetts · ≈ 8 × 5″ (19 × 13 cm) 
6/4/2013 · Tom and Susan’s, Pepperell, Massachusetts · ≈ 5 × 6″ (13 × 14 cm) 
| Kingdom | Plantae | Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin) |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Magnoliophyta | Flowering plants, also known as angiosperms |
| Class | Liliopsida | Monocots (plants with a single seed leaf); includes the lily family |
| Subclass | Liliidae | Includes lilies, orchids, and many others |
| Order | Asparagales | A diverse group that includes asparagus |
| Family | Iridaceae | Iris family—perennial plants that grow from bulbs—also includes crocuses, gladiolas, and the genus Moraea |
| Genus | Iris | Named for the Greek goddess of the rainbow |
| Species | sibirica | Of or from Siberia |
Iris sibirica ‘Caesar’s Brother’ description by Thomas H. Kent, not updated.
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