Leaf nodes in tikz-qtree are not aligned with parents when using grow=left

Question

I am building a rotated tree using tikz-qtree. Whenever i use the setting "grow=left", the leaf nodes will be shifted a constant distance compared to their parent nodes, so that the lines between them aren't vertical. This does not seem dependent on the rotation.

Is there any way to avoid it? :)

My code is:

\documentclass[12pt, a4paper]{article}
\usepackage{tikz-qtree}

\begin{document}

\begin{figure}[ht]
\centering
\begin{tikzpicture}[grow=left, sibling distance=5pt,rotate=90,transform shape]
\tikzset{frontier/.style={distance from root=275pt}}
\Tree [ 
    [tip1 ]
    [
        [tip2 ]
        [
            [
                [tip3 ]
                [
                    [
                        [tip4 ]
                        [
                            [tip5 ]
                            [tip6 ]
                        ]
                    ]
                    [
                        [
                            [tip7 ]
                            [tip8 ]
                        ]
                        [
                            [
                                [tip9 ]
                                [tip10 ]
                            ]
                            [
                                [tip11 ]
                                [tip12 ]
                            ]
                        ]
                    ]
                ]
            ]
            [
                [tip13 ]
                [
                    [tip14 ]
                    [
                        [
                            [tip15 ]
                            [tip16 ]
                        ]
                        [
                            [
                                [tip17 ]
                                [tip18 ]
                            ]
                            [
                                [tip19 ]
                                [tip20 ]
                            ]
                        ]
                    ]
                ]
            ]
        ]
    ]
]
\end{tikzpicture}
\caption{Dendogram}
\label{fig:dendogram}
\end{figure}

\end{document}

And the resulting figure is:

Answer 1

It seems that tikz-qtree aligns the base anchor of the leaf nodes with the corresponding parent node if there is only one branch. Then, it draws the branch connecting the parent node to the center anchor of the leaf node. This works for vertical trees, but causes misalignment for horizontal trees.

To solve this, add

every leaf node/.append style={anchor=center}

to the options of your tikzpicture.

\documentclass[12pt, a4paper]{article}
\usepackage{tikz-qtree}

\begin{document}

\begin{figure}[ht]
\centering
\begin{tikzpicture}[grow=left, sibling distance=5pt, rotate=90, transform shape, every leaf node/.append style={anchor=center}]
\tikzset{frontier/.style={distance from root=275pt}}
\Tree [ 
    [tip1 ]
    [
        [tip2 ]
        [
            [
                [tip3 ]
                [
                    [
                        [tip4 ]
                        [
                            [tip5 ]
                            [tip6 ]
                        ]
                    ]
                    [
                        [
                            [tip7 ]
                            [tip8 ]
                        ]
                        [
                            [
                                [tip9 ]
                                [tip10 ]
                            ]
                            [
                                [tip11 ]
                                [tip12 ]
                            ]
                        ]
                    ]
                ]
            ]
            [
                [tip13 ]
                [
                    [tip14 ]
                    [
                        [
                            [tip15 ]
                            [tip16 ]
                        ]
                        [
                            [
                                [tip17 ]
                                [tip18 ]
                            ]
                            [
                                [tip19 ]
                                [tip20 ]
                            ]
                        ]
                    ]
                ]
            ]
        ]
    ]
]
\end{tikzpicture}
\caption{Dendogram}
\label{fig:dendogram}
\end{figure}

\end{document}

Answer 2

hm, your dendogram can be translated to forest as:

\documentclass[12pt, a4paper]{article}
\usepackage{forest}

\begin{document}
    \begin{figure}[ht]
\centering
\begin{forest}
for tree = {
    s sep=0pt,
    if n children=0{rotate=90,anchor=east,tier=word}%
                   {coordinate}
            }
[
    [[tip1]]
    [
        [[tip2]]
        [
            [
                [[tip3]]
                [
                    [
                        [[tip4]]
                        [
                            [[tip5]]
                            [[tip6]]
                        ]
                    ]
                    [
                        [
                            [[tip7]]
                            [[tip8]]
                        ]
                        [
                            [
                                [[tip9]]
                                [[tip10]]
                            ]
                            [
                                [[tip11]]
                                [[tip12]]
                            ]
                        ]
                    ]
                ]
            ]
            [
                [[tip13]]
                [
                    [[tip14]]
                    [
                        [
                            [[tip15]]
                            [[tip16]]
                        ]
                        [
                            [
                                [[tip17]]
                                [[tip18]]
                            ]
                            [
                                [[tip19]]
                                [[tip20]]
                            ]
                        ]
                    ]
                ]
            ]
        ]
    ]
]
\end{forest}
\caption{Dendogram}
\label{fig:dendogram}
    \end{figure}
\end{document}