Hippeastrum Herbert 1821

Identification key for the Hippeastrum species occurring in the Serra da Mantiqueira

1. Leaves pseudopetiolate to obscurely pseudopetiolate, lamina lanceolate to oblanceolate; ovary with up to 12 ovules per locule; interior of mature capsule bright red, seeds globose................................................................. Hippeastrum reticulatum (Fig. 4J)

- Leaves sessile, lamina lorate, linear, falcate or strongly falcate; ovary with more than 24 ovules per locule; mature capsule not pigmented, seeds papery, flattened................................................................................................................................................... 2

2. Lamina strongly falcate, subfleshy; flowers nearly actinomorphic, salverform; stamens erect, anthers at the same height.............................................................................................................................................................. Hippeastrum velloziiflorum (Fig. 4L)

- Lamina lorate, linear or falcate, chartaceous; flowers zygomorphic, campanulate to infundibuliform; stamens deflexed, anthers in different positions............................................................................................................................................................................. 3

3. Lamina linear, 0.1–0.5 cm wide.................................................................................................. Hippeastrum cipoanum (Fig. 4D)

- Lamina lorate or falcate, more than 1 cm wide................................................................................................................................ 4

4. Flowers green; staminal filaments exceeding the length of the perigone................................ Hippeastrum calyptratum (Fig. 4C)

- Flowers white to cream, red, dark red to carmine, salmon, orange, sometimes greenish proximally and reddish distally, rarely pink; staminal filaments shorter than the perigone.................................................................................................................................... 5

5. Perigonal tube longer than 4 cm.............................................................................................. Hippeastrum brasilianum (Fig. 4B)

- Perigonal tube up to 4 cm long......................................................................................................................................................... 6

6. Paraperigone absent.......................................................................................................................................................................... 7

- Paraperigone callose, fimbriate, a pellicle of fused fimbriae or a ring of broad scales...................................................................... 8

7. Flowers white with pink striations.................................................................................... Hippeastrum abatinguara (Figs. 1 & 2)

- Flowers red to orange.................................................................................................................... Hippeastrum striatum (Fig. 4K)

8. Stigma capitate to tri-lobed.............................................................................................................................................................. 9

- Stigma trifid.................................................................................................................................................................................... 10

9. Flowers salmon or orange, rarely pink, yellowish to green at the base, forming a circular pattern at the throat; upper tepals distally reflexed; perigonal tube 2.3–3.2 cm long.................................................................................... Hippeastrum puniceum (Fig. 4H)

- Flowers dark red to carmine, greenish white at the throat with extensions to the middle of the limb; upper tepals not reflexed; perigonal tube about 1 cm long........................................................................................................ Hippeastrum reginae (Fig. 4I)

10. Paraperigone a ring of broad scales................................................................................................ Hippeastrum aulicum (Fig. 4A)

- Paraperigone callose, fimbriate or a pellicle of fused fimbriae...................................................................................................... 11

11. Tepals almost isodiametrical, lateral sepals symmetrically elliptic to narrowly elliptic.......... Hippeastrum morelianum (Fig. 4F)

- Upper sepal much wider and longer than lower petal, lateral sepals falcate.................................................................................. 12

12. Bulb subterranean; perigonal tube 1.4–2 cm long; paraperigone a pellicle of fused fimbriae............................................................................................................................................................................................................... Hippeastrum glaucescens (Fig. 4E)

- Bulb on rocks; perigonal tube 2–2.4 cm long; paraperigone callose with faint linear scratches between the base of the expansions on the three upper tepals........................................................................................................... Hippeastrum psittacinum (Fig. 4G)