Key to Gayophytum

View taxon page for Gayophytum

(For a list of species in Gayophytum, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Petals 3–8 mm; stigma 

exserted 

Protruding out of surrounding structure(s) (e.g., stamens exserted from corolla).

beyond anthers (see also Gayophytum heterozygum)

2. Petals 3–7 mm; CaR, n SNH (Plumas Co.), SnBr, Wrn ..... G. diffusum subsp. diffusum

2' Petals 4–8 mm; SN (s of Placer Co.) ..... G. eriospermum

1' Petals 0.5–3 mm; stigma generally not exserted beyond anthers

3. Seeds ± 50% aborted; fruit very irregular, lumpy ..... G. heterozygum

3' Seeds all maturing; fruit not irregular, smooth to very knobby

4. Fruit flat; plant generally branched only proximally, 2° branches 0–many

5. Lateral fruit valves staying attached; petals 0.8–1.5 mm; larger stamens ± 0.7 mm ..... G. humile

5' All fruit valves coming free; petals 1.3–1.8 mm; larger stamens 0.8–1.5 mm ..... G. racemosum

4' Fruit ± 

cylindric 

Elongate, with parallel sides and, at any point, round in transverse section.

; plant branched only distally to throughout, 2° branches generally many

6. Seeds in each chamber overlapped, generally in 2 rows

7. Petals 1.2–3 mm; 

pedicel 

Stalk of an individual flower in an inflorescence, or the corresponding structure in fruit.

generally < fruit ..... G. diffusum subsp. parviflorum (3)

7' Petals 0.7–1.5 mm; pedicel generally > fruit ..... G. ramosissimum

6' Seeds in each chamber not overlapped, in 1 row

8. Seeds > 9, ± 

opposite 

1. Arranged in pairs along an axis - e.g., two leaves per node. 2. Occurring in the same rank, directly above or below, as 'stamens opposite petals'. 3. Located directly across from.

; fruit slightly knobby

9. Branches ± throughout, generally 2–8 

nodes 

Position on a stem from which one or more structures (especially leaves, buds, branches, or flowers) arise.

between ..... G. decipiens

9' Branches at base or not, many distally, generally 0–1 

node 

Position on a stem from which one or more structures (especially leaves, buds, branches, or flowers) arise.

between ..... G. diffusum subsp. parviflorum (3)

8' Seeds (1)3–9, generally 

alternate 

1. Arranged singly, often spirally, along an axis - e.g., one leaf per node. 2. Occurring in different ranks, appearing to be between, not directly above or below, as 'stamens alternate petals'.

; fruit very knobby

10. Seeds 6–9; fruit generally > pedicel ..... G. diffusum subsp. parviflorum (3)

10' Seeds (1)3–5; fruit ± = pedicel ..... G. oligospermum

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