Epilobium ciliatum

      
Northern Willowherb

Upper Leaf Bottom

Antelope Lake Regional Park
13-Aug-2004

Note that the key to the species in Flora of Alberta requires "cauline leaves either linear or entire, not both".  In fact, the cauline leaves are lanceolate to ovate and slightly toothed.

Ciliatum:  Answers to key questions in Budd's Flora and Flora of Alberta leading to this species.  

perennial; NOT annual

plants not clumped, or if so loosely, forming sessile, leafy rosettes or fleshy turions; NOT [plants clumped or caespitose, forming short, leafy, epigaeous stolons]

plants lacking stolons; NOT [with basal thread-like, remotely leafed stolons, terminating in compact, fleshy turions]

plants forming rosettes or large, hypogaeous turions; NOT [plants lacking rosettes, only compact hypogaeous turions present]

plants 0.3-19.0 dm high; NOT 0.2-6.0 dm high

stem-base erect; NOT [decumbent to ascending]

bark NOT shreddy

stem with hairy, elevated lines, decurrent from the leaf bases

leaves opposite or verticillate, at least below; NOT alternate

leaves lanceolate to oblong; NOT narrowly lanceolate, NOT linear, NOT [ovate to elliptic]

leaves toothed

leaves NOT rolled at margins

cauline leaves either linear or entire, NOT both (FOA)

gemmae absent; NOT [often present in the upper leaf-axils]

inflorescence predominantly glandular mixed with strigillose hairs; NOT [strigillose, eglandular], NOT [white-canescent, occasionally with a few glandular hairs]

flowers actinomorphic; NOT zygomorphic

flowers small, less than 12 mm across

hypanthium present

petals white, pink or rose-purple; NOT yellow, NOT cream

style NOT deflexed

stigma entire, cylindric, clavate or capitate; NOT distinctly 4-lobed

seeds narrowly obovoid; NOT broadly obovoid

seeds 0.8-1.6 (1.9) mm long; NOT 1.1-1.6 (1.8) mm long

seeds 0.3-0.8 mm wide; NOT 0.8-1.2 mm wide

seeds longitudinally striate with hyaline crests or ridges but lacking distinct papillae; NOT distinctly papillose

coma white or dingy; NOT reddish

coma readily detached; NOT persistent

 

Epilobium: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus.

flower parts in 4's; NOT 2's

fruit a capsule; NOT nut-like

fruit many-seeded; NOT 1-seeded

fruit opening by valves; NOT indehiscent

fruit NOT covered with hooked bristles

seeds with a tuft of silky hairs (coma) at one end

 

Onagraceae: Answers to key questions in Budd's Flora leading to this family.

herbs; NOT shrubs, NOT trees

terrestrial plants; NOT [mud plants with small axillary flowers], NOT aquatic

plants NOT with colored milky juice

plants with more than one normal leaf

leaves opposite, whorled, or basal; NOT alternate

plants WITHOUT large petal-like bracts

flowers with two floral rings, and with each petal distinct from the others

flowers 2- or 4-merous

style single; NOT 2 or more

ovary inferior