781 titles (books/journals)
3,528 volumes
1,520,256 pages
207,548 links to protologues
Recent additions 
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Botanicus is made possible through support from the Institute of Museum and Library Services, W.M. Keck Foundation,
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- W. and J. Innys.
- W. Johnstone.
- W. Owen.
- Waggaman, Samuel.
- Wagner, Hermann.
- Wagner, Johann Jacob.
- Wahlberg, Pehr Fredrik,
- Wallenius, Conrad.
- Wallich, N.
- Wallner, Samuel,
- Walter, Thomas,
- Wandelaar, Jan,
- Warden, C. J. H.
- Warner, Robert
- Watson, Sereno,
- Webb, Philip Barker,
- Weddell, Hugh Algernon,
- Weiditz, Hans,
- Weigel, T. O.
- Weinmann, Johann Wilhelm,
- Wendel Rihel.
- Wensjoe, Thure,
- Wernham, Herbert Fuller,
- Wetstenius, J.
- Wetterling, Johannes.
- Whipple, Amiel Weeks,
- White, B.
- White, Benj., et filium.
- Whittemore, Alan Thomas,
- Widmark, Fr. Ol.
- Wied, Maximilian,
- Wigglesworth, Edward
- Wight, Robert,
- Wild, T.
- Wildeman, E. de
- Wiley & Putnam.
- Willdenow, Karl Ludwig,
- Willem Smith.
- Williams, Benjamin Samuel,
- Williams, E. E.
- Willkomm, Moritz,
- Wilson, Ernest Henry,
- Winberg, Leopold.
- Winblad, Jacob Emil.
- Winkler, Eduard,
- Wislizenus, F. A.
- Wistrand, August Timoleon,
- Withering, William,
- Wittstein, Georg Christian,
- Woodville, William,
- Woodworth, J. B.
- Wright, Charles,