Purola - 50 acre site for this study

A Phenological and Morphological Study of Berberis in Northern Hays County (Central Texas)

by Bob Harms 

Distribution

	Distribution of B. swaseyi in Texas		B. swaseyi Distribution in the Botanical Literature
	Early B. swaseyi discoveries		GPS Google display of plants studied

Phenology

	Bloom Phenology		Infructescence Phenology
	A Phenological Study of B. swaseyi Fruit Color		Maturation and Fruit Color of B. swaseyi ID S8

Hybridization

B. trifoliolata X B. swaseyi Hybrids

A 5-foliolate "B. trifoliolata"

The Shrub

	Shrub Form		Stem Dimorphism & Shrub Architecture
	Hybrid Shrub Pictures		Phenology of Vegetative Growth
	The Bush Base — A Lignotuber		Extracting a Lignotuber
	Barberry Webworm    (Omphalocera dentosa)

Leaves

	Overview of Leaf Morphology and Phenology in N. Hays County		Leaf Characteristics for B. swaseyi and B. trifoliolata in the Botanical Literature
	Distinctive Characteristics of Our Berberis in the Current Literature		Leaf Form & Size, Leaflet Arrangement, & the Petiole
	Leaflet Form & Dimensions		The Leaflet Base
	Sessile and Stalked Terminal Leaflets		B. swaseyi Basal Leaflets and Leaflet Reduction
	Spine Base Width & Length		Leaflet Surface Features
	B. trifoliolata var. glauca		Heteroblasty
	Stipules		Stipule Images
	Adaptation of Berberis Leaves to Sun & Shade		B. swaseyi Sun and Shade Leaves
	B. trifoliolata Sun and Shade Leaves		Leaf Thickness by Exposure and Species
	Midrib/Lamina Measurements
	Disarticulation of Berberis Leaves		Winter Maroon Shift of B. swaseyi

Bud Scales

	Cataphylls / Bud Scales		Cataphyll Images
	Persistent Cataphylls of Berberis in Central Texas		Cataphylls in the Berberis/Mahonia Literature
	Deciduous & Persistent in Botanical Descriptions

Inflorescence

	Inflorescence		B. trifoliolata & B. swaseyi Racemes
	Inflorescence Pictures		B. trifoliolata Emerging Short Shoot with Inflorescence
	Inflorescence and Flower Bracts		Additional Inflorescence Bract Images
	Basal Bracteole Pairs

Flowers

	Flowers		Flower Details
	B. repens Flower		Nectaries

Stamen Morphology

	Berberis Stamen Morphology		B. trifoliolata & B. swaseyi Filament Teeth
	The Distinctive Role of Stamen Filaments in Berberis		Irritable Stamens
	Filament Teeth as an Obstacle to Self-Pollination		Earlier Study of Berberis Stamen Irritability

Gynoecium

	Gynoecium Morphology		Longitudinal Cuts of Mature Sized Carpels
	Funiculi Images		The Style & Pericarp Connection

Fruit & Seeds

	Fruit		Putative Fruit Characteristics for B. swaseyi and B. trifoliolata
	Seeds

Fertility, Germination, Seedlings

Fertility / Germination

Seedling Images / Key