Outline is Representative of Size and Shape:

Name Details:
Identifd By:  Ripley P. Bullen
Named For:  Hillsborough County, Florida
Date Identified:  1968
Type Site:  Culbreath Bayou Site, Hillsborough County, Florida

Comment: This point was first described by Lyman O. Warren in 1967 for examples found in at the Culbreath Bayou site.
Point Validity: Valid type

Bullen was a distinguished anthropologist and Curator Emeritus of the Florida Museum of Natural History.  He was dedicated to identifying and typing projectile points from Florida.  This point was named in a professional publication and is professionally a widely recognized type.  This is a valid type.
Hillsborough Contracting Stem
AKA: Batwing (collectors)
Cluster: Newnan Cluster
Description of Physical Characteristics and Flaking Pattern:
This is a thin medium to large (1.25 to 4.25 inches) triangular point with a contracting stem. The cross section for this point is flattened to thin elliptical.  The blade may vary from straight to excurvate.  The shoulders generally have a downward angle and may extend down below the base.  The stem is small and contracting with a convex to pointed base.  Occasionally the base is straight.  This point has a random flaking pattern and commonly has a high quality of workmanship.
Size Measurements:

Total Length - 38 to 110 mm (average 64 mm),  Stem Length - 5 to 10 mm,  Width - 28 to 55 mm (average 37 mm), Stem Width - 10 to 15 mm,  Thickness - 4 to 8 mm
Commonly Utilized Material:
Additional Comments:

Most researchers since Bullen has viewed the Newnan and the Hillsborough as variants of the same point type (Farr, 2006).  The Hillsborough type has a smaller narrower stem while the Newnan type has a wider stem (Granger and Granger, 2013).

Bullen (1975) distinguished the Hillsborough from the Newnan point based on the stem.  The Newnan point has a more "squarish" stem than is seen on the Hillsborough point.  However, he does list this as a presumably extreme variant of the Newnan point

This point has been called the Batwing point  by local collectors


Distribution:
Distribution Comments:

This point is primarily found in central to northern Florida.  This point may be found into southern Georgia and southeastern Alabama with decreased frequency.
Age / Periods:
Date: 5,400 - 3,000 B.P.
Cultural Period: Middle to Late Archaic
Glacial Period: Middle Holocene to Neoglacial
Culture:
Age Details:
This is part of the Florida Archaic Stemmed Complex.
Similar Points:
AlachuaMarion
Other points in this custer / Related / Associated Points:
Pictures: 

Pictures Provided By:
 Hillsborough Projectile Point, Hillsborough Arrowhead
William Lunsford
Anne Rock
Matthew Merritt
James Woods
Son Anderson
The Artifact Hound
The Coinman
River Relics
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References: (See Reference Page, Entry Number):

23, 30, 58, 59, 167, W11, W18