I have the requirement to draw a tree down- and then upgrowing. In pgfmanual, p. 322, the grow key is mentioned. I have no solution to specify the root/parent of the opposite side. Also there is spoken about a personally to define growth function, but there is no example. So I put two trees, one up-, the other downgrowing, in one tikz picture env. But alignment is a real horror (see xhift commands) and perhaps impossible. So, I need help to build one tree with changing growth direction. The problem for me is that I have no idea to specify the parent of some childs, that would be necessary for the connection "Genus: Brassica" coming from above species, for "Order: Asparagales" and "Class: Magnoliopsida" too. In the last case three Ordo-childs with one parent (Class...), if I grow down. I hope, if someone can solve this, that alignment would be a small challenge and "Class: Magnoliopsida" (at the end of the tree) would be centered as the other parent "Outdoor". Many thanks in advance. What I have reached so far you can see in the mwe.
\documentclass[10pt,a4paper,table]{article}
\usepackage[showframe,
left=2cm,
right=2cm,
bottom=1.75cm]{geometry}
%%%%%----- tikz -----%%%%%
\usepackage{tikz,fp}
\tikzstyle{every picture,
}+=[remember picture]
\usepackage[ngerman]{babel}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc} % \"a usw. !!!
\usepackage[figurename=Abb.]{caption}
\begin{document}
\tikzstyle{every picture}+=[remember picture]
\begin{figure}[h]\centering
\begin{tikzpicture}[%sibling distance=15em,
level distance=25mm,
every node/.style = {shape=rectangle, rounded corners,
draw, align=left, inner sep=4pt,
top color=white, bottom color=blue!20,
},
level 1/.style={sibling distance=10em},
]
\node {\textsc{Outdoor Freilandflächen} 112.000 ha\\
\textsc{Ernte:} 3.2 Mio to\\
\textsc{Betriebe ges.:} 6.600\\
\textsc{Ökologisch:} 1.100
}
child { node (spargel) {\textsc{Spargel:}\\ 24.000 ha\\ 100.000 to} }
child { node (zwiebel) {\textsc{Speisezwiebeln:}\\ 9.700 ha\\} }
child { node (moehren) {\textsc{Möhren:}\\ 10.200 ha\\} }
child { node (weisskohl) {\textsc{Weißkohl:}\\ 5.800 ha\\} } %
child { node (blumenkohl) {\textsc{Blumenkohl:}\\ 4.200 ha\\} } %
;
\end{tikzpicture}
%
%
\begin{tikzpicture}
[level distance=20mm,
every node/.style = {shape=rectangle, rounded corners,
draw, align=left, inner sep=4pt,
top color=white, bottom color=blue!20,
},
level 1/.style={sibling distance=15em},
]
\node[xshift=250mm] {\textsc{Class:}\\ Magnoliopsida %xhift doesn't work
}[grow=up]
%
child {node[xshift=30mm]{\textsc{Ordo:}\\ \textit{Brassicales} }
child {node {\textsc{Familia:}\\ \textit{Brassicaceae:} }
child {node{\textsc{Subfamilia:} \\ \textit{missing} }
child {node{\textsc{Tribus:} \\ \textit{missing} }
child {node {\textsc{Genus:}\\ \textit{Brassica} }
child {node[xshift=-10mm] (sblumenkohl){\textsc{Species:}\\
\textit{Brassica oleracea} \\var.
\textit{botrytis}
\textsc{L.} \\ }
}
child {node[xshift=08mm] (sweisskohl){\textsc{Species:}\\
\textit{Brassica oleracea} \\convar.
\textit{capitata} \\var.
\textit{alba}
\textsc{L.}
}
}
}
}
}
}
} %ende ordo Brassicales
child {node[xshift=28mm] {\textsc{Ordo:}\\ Apiales }
child {node {\textsc{Familia:}\\ \textit{Apiaceae:} }
child {node{\textsc{Subfamilia:} \\ \textit{missing} }
child {node{\textsc{Tribus:} \\ \textit{missing} }
child {node {\textsc{Genus:}\\ \textit{Daucus} \textsc{L.} 1753 }
child {node(smoehren){\textsc{Species:} \\ \textit{Daucus carota} \\ssp. \textit{sativus} \\ }
}
}
}
}
}
} %ende apiales
%
%
child {node[xshift=12mm]{\textsc{Ordo:}\\ \textit{Asparagales}\\ }
child {node[xshift=09mm]{\textsc{Familia:}\\ \textit{Amaryllidaceae:} }
child {node{\textsc{Subfamilia:} \\ \textit{Allioideae} }
child {node {\textsc{Tribus:}\\ \textit{Allieae} }
child {node{\textsc{Genus:} \\ \textit{Allium} \textsc{} }
child {node(szwiebel){\textsc{Species:} \\ \textit{Allium cepa} \textsc{}\\ \\ }
}
}
}
}
}
%
child {node[xshift=27mm] {\textsc{Familia:}\\ \textit{Asparagaceae:} }
child {node[xshift=0mm]{\textsc{Subfamilia:} \\ \textit{Asparagoideae} }
child {node[xshift=0mm]{\textsc{Tribus:} \\ \textit{missing} }
child {node[xshift=0mm] {\textsc{Genus:} \\ \textit{Asparagus} }
child {node[xshift=0mm](sspargel){\textsc{Species:} \\ \textit{Asparagus} \\ \textit{officinalis} \textsc{L.}\\ }
}
}
}
}
}
} %ende ordo asparagales
;
\draw [shorten >=0pt,thick] (zwiebel.south) -- (szwiebel.north);
\draw [shorten >=0pt,thick] (spargel.south) -- (sspargel.north);
\draw [shorten >=0pt,red,thick,dashed] (moehren.south) -- (smoehren.north);
\draw [shorten >=0pt,green,thick,dashed] (weisskohl.south) -- (sweisskohl.north);
\draw [shorten >=0pt,red,thick,dashed] (blumenkohl.south) -- (sblumenkohl.north);
\end{tikzpicture}
\caption[Übersicht \textit{Gemüse BRD 2013} \textsc{}] {Übersicht \textit{Gemüse BRD 2013} }
\end{figure}
\end{document}
