Carolina geranium

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Geranium carolinianum


Nativity

Native

Status

 

Habitat

Dry. Disturbed areas. Full to partial sun.

Flowering

May to September

Flower Color

Pink

Height

4 to 24


Identification

This is a 4 to 24 tall, annual forb rises on several stems from a central taproot. It is usually about 12 to 24 tall at maturity.

The stems are ascending, freely branched, and covered with soft, spreading hairs. Some of the upper branches have glandular hairs between the nodes.

The leaves are opposite, 1 to 2¾ wide, and palmately divided into 5 to 9 deep lobes, cut almost to the base. The leaf margins have widely spaced, deeply-cut teeth, that may amount to secondary lobes. The lobe tips are blunt.

The inflorescence is a tight cluster of many flowers in the upper leaf axils. The cluster is at the end of a long stalk. The individual flowers are on two shorter individual flower stalks that are about the same length as the sepals.

The flowers are to ½ (possibly ) wide with 5 petals and 5 sepals. The sepals have short, stiff bristles at their tips. The petals are pink and slightly notched at the tip.

The fruit is a 1 to 2 long, hairy capsule with a beak at the tip that is a little over 1/16 long. The fruit is in the shape of a crane’s bill, giving this plant one of its common names, Carolina Cranesbill.

 
Similar
Species

Bicknell’s cranesbill (Geranium bicknellii) leaves are divided into usually 5 deep lobes, cut almost to the base. The inflorescence is a cluster of 2 flowers at the end of a long stalk. The individual flowers are on two shorter individual flower stalks that are more than twice the length of the sepals. The fruit is ¾ to 1 long.

Meadow geranium (Geranium pratense) has no central stem, rather two basal leaves and a flowering stem with a single pair of opposite leaves. The leaf stalks and flower stalks are covered with sticky, glandular hairs. The inflorescence is a small cluster at the end of a long stalk. The flowers are large, 1 to 1½ wide. The flower petals are bright blue-violet and are rounded, not notched, at the tips. It is an introduced species. It has been recorded only in St. Louis County.

Robert’s Geranium (Geranium robertianum) leaves are divided into usually 3 to 5 leaflets. The leaflets are cut all the way to the base, with at least the terminal leaflet on an evident leaflet stalk. It has been recorded only in St. Louis County.

Siberian cranesbill (Geranium sibiricum) flowers occur singly or in pairs. The fruit has a beak at the tip that is a less than 1/16 long. It has been recorded only in Houston and Goodhue Counties.

Wild geranium (Geranium maculatum) has no central stem, rather two basal leaves and a flowering stem with a single pair of opposite leaves. The inflorescence is a flat or round topped cluster of 1 to 6 flowers at the end of a long stalk. The flowers are large, 1 to 1½ wide. The flower petals are rose-purple, pale purple, violet-purple or, rarely, white, with darker fine lines radiating from the center of the flower.


Range Range Map   Sources: 2, 3, 5.
 
Sightings    

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Taxonomy

Family:

Geraniaceae (geranium)

 

Genus:

Geranium

 

Subgenus:

Geranium

 

Section:

Geranium

 
Synonyms

 

 
Common
Names

Carolina geranium


 

Glossary

 

axil

The upper angle where the leaf stalk meets the stem.

 

glandular hairs

Hairs spread over aerial vegetation that secrete essential oils. The oils act to protect against herbivores and pathogens or, when on a flower part, attract pollinators. The hairs have a sticky or oily feel.

 

node

The small swelling of the stem from which one or more leaves, branches, or buds originate.

 

palmately Divided

Similar to a hand. Having more than three lobes that radiate from a single point at the base of the leaf.

 

sepal

An outer floral leaf, usually green but sometimes colored, at the base of a flower.

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