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Geranium caespitosum, the purple cluster geranium or pineywoods geranium, is a perennial herb native to the western United States and northern Mexico. Its US distribution includes Arizona , Colorado , Nevada , New Mexico , Texas , Utah , and Wyoming .
The seeds remain dormant while buried in the forest floor, sometimes for centuries, until a fire removes the organic litter and exposes the seeds to sunlight. The geraniums will germinate, bloom, and set seed profusely for several years after the fire, until other plants grow large enough to shade them out.
Geranium macrorrhizum – rock cranesbill, bigroot geranium, Bulgarian geranium, zdravetz; Geranium macrostylum; Geranium maculatum – spotted geranium, wild geranium, wood geranium, spotted cranesbill, wild cranesbill, alum bloom, alum root, old maid's nightcap; Geranium maderense – Madeira cranesbill, giant herb-robert
The seed surfaces are finely reticulated. The seeds have pits or depressions in them and are wingless. The fruit is dry, and does not split open when ripened. The root system of Geranium carolinium is a taproot structure that can grow to a depth of 15 centimeters. The plant has a superior ovary.
Pelargonium flower. Pelargonium (/ ˌ p ɛ l ɑːr ˈ ɡ oʊ n i. ə m /) [5] is a genus of flowering plants that includes about 280 species of perennials, succulents, and shrubs, [4] commonly called geraniums, pelargoniums, or storksbills.
Geranium wallichianum is a species of hardy flowering herbaceous perennial plant in the genus Geranium, family Geraniaceae. It is native to the Himalayas. It grows to 60 cm (24 in) tall and broad, with hairy toothed leaves and masses of bright blue flowers in summer.
Geranium robertianum, commonly known as herb-robert, or (in North America) Robert's geranium, is a species of cranesbill that is widespread throughout the northern hemisphere and introduced to some countries in the southern. It is common in woods, hedges, gardens, and on waste ground, and can also be found on shingle beaches and limestone ...
The specific epithet hortorum is a genitive plural form of the Latin "hortus" ("garden") and therefore corresponds to "horticultural".The name was created by the American botanist Liberty Hyde Bailey who in 1914, writes "The large number of forms of the common geranium, derives from the variation and probably the crossing of P. zonale and P. inquinans (and possibly others) during more than a ...