Cruciferae

Volume I (1961) - Flora of New Zealand Indigenous Tracheophyta - Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledons

CRUCIFERAE

Fls perfect, regular, or nearly so, us. in bractless racemes; sepals 4, petals 4-(0); stamens us. 6, tetradynamous; anthers 2-(1)-celled. Ovary us. of 2 united carpels divided by a thin membrane into "cells"; stigmas 2, often connate; fr. us. dehiscent. Seeds us. without endosperm; cots accumbent [0= ] incumbent [0|| ] or sts conduplicate [0)) ]. Annual to perennial herbs or subshrubs with mostly alt. exstipulate lvs. Subcosmopolitan with some 350 genera and 2500 spp.

Key

Fls yellow

6. RORIPPA

Fls not yellow

Pod at least 3 times as long as wide, a silique

Pod < 3 times as long as wide, a silicle

Seeds in 1 row

Seeds in 2 rows, sts irregularly so

Cots incumbent; hairs stellate, us. dense; pod not dehiscing elastically

7. ISCHNOCARPUS

Cots accumbent; hairs simple or branched but not stellately so, us. sparse; pod dehiscing elastically

4. CARDAMINE

Rootstock slender, lvs mainly cauline, valves convex

6. RORIPPA

Rootstock very stout, lvs mainly basal, valves flat or nearly so

5. CHEESEMANIA

Seed 1 per cell

1. LEPIDIUM

Seeds 3 or more per cell

Pods broadly winged

2. NOTOTHLASPI

Pods not winged

Seeds 3-8 per cell; lvs mainly radical; pubescence stellate

3. PACHYCLADON

Seeds many per cell; lvs mainly cauline; pubescence not stellate

6. RORIPPA

The N.Z. genera are us. placed in the tribes:

1. LEPIDEAE-Fr. a silicle, cots incumbent: 1: Lepidium, 2. Notothlaspi, 3. Pachycladon.

2. ARABIDEAE-Fr. a silique, cots accumbent: 4. Cardamine, 5. Cheesemania, 6. Rorippa.

3. SISYMBRIEAE-Fr. a silique, cots incumbent: 7. Ischnocarpus.

Notothlaspi, Pachycladon are endemic.

Fig. 8. CRUCIFERAE. Silicles: Notothlaspi, Pachycladon, Rorippa, Lepidium. Siliques: Ischnocarpus, Cheesemania. © All rights reserved. [Image: 4X1U]

Cruciferae

Key

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