Primary Xylem
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Curtis, Lersten, and Nowak 2002 rev. 2015
Ranunculus
(buttercup) stem cross section.
Young
Ranunculus
(buttercup) stem cross section.
Young
Ranunculus
(buttercup) stem cross section.
Dicot (
Ranunculus
?) stem cross section.
Ranunculus
(buttercup) vascular bundle with bundle sheath, bundle cap, phloem, procambium, metaxylem, and protoxylem.
Cucurbita
stem cross section with protoxylem and protoxylem lacunae.
Cucurbita
stem vascular bundle cross section.
Cucurbita
vascular bundle cross section with large metaxylem cells and collapsed protoxylem.
Cucurbita
stem cross section with protoxylem and protoxylem lacunae.
Cucurbita
stem vascular bundle cross section with protoxylem and metaxylem.
Helianthus
(sunflower) stem cross section.
Helianthus
(sunflower) stem cross section: vascular bundle.
Pastinaca
(parsnip) vascular bundle cross section.
Podophyllum
(May-apple) stem with vascular bundle and early development of fascicular cambium.
Medicago
(alfalfa) stem cross section: early development of vascular cambium.
Medicago
(alfalfa) stem cross section: early secondary growth.
Medicago
(alfalfa) stem with early secondary xylem.
Ilex
(holly) stem cross section: early secondary growth.
Zea mays
(maize) stem cross section.
Zea mays
(maize) vascular bundle cross section.
Zea mays
(maize) vascular bundle cross section.
Zea mays
(maize) vascular bundle cross section.
Parthenocissus
(Virginia creeper) leaf clearing with minor vein protoxylem and mesophyll cavities.
Cucurbita
protoxylem with spiral and annular thickenings.
Musa
(banana) leaf clearing showing protoxylem in a minor vein.